JP2020135108A - Management system and management device - Google Patents

Abstract

To provide a management system and a management device capable of securing safety and efficiently managing arrival-in-port.SOLUTION: A management system 1 is provided at an observation position near a sea route of a ship and includes an anemometer for measuring wind information and a management device for managing navigation of the ship. The management device includes a tidal current calculation unit for calculating a tidal current at the observation position based on the wind information measured by the anemometer, and a determination unit for determining whether or not arrival-in-port is permitted based on the tidal current calculated by the tidal current calculation unit. The tidal current calculation unit calculates at least tide flow velocity based on a tidal component based on a tidal current conditioning constant of an arrival-in-port route environment in the wind information measured by the anemometer, a flow component of a tide generated by wind represented by the wind information, and an inflow component from a river forming arrival-in-port route environment. The determination determines whether or not to permit navigation related to arrival-in-port based on the tide flow velocity calculated by the tidal current calculation unit and the tide flow velocity in an allowable tidal current allowing influence of a hull operation related to the arrival-in-port.SELECTED DRAWING: Figure 1

Description

The present invention relates to a management system and a management device.

Due to the recent increase in transactions, the number of ships coming and going is increasing, and there is naturally a limit to the expansion of receiving facilities.Therefore, it is urgent to ensure the safety of entry (berthing) and tolerate the acceptance of ships. It has become.

This tolerant acceptance allows vessels to have a relatively short berth for temporary berthing to enter (berth), which can reduce energy consumption and collide with each other. Etc. can be avoided or minimized, and safety will be improved.

In order for a ship to safely enter (berth) a berth, etc., it is necessary to consider various conditions (weather conditions, etc.). Among them, it is necessary to consider the tide. This tide indicates that the water level (tide level) of the sea surface changes (rises and falls) by periodically repeating high tide and low tide.

Compared to the rising tide from low tide to high tide, when the sea level drops from high tide to low tide (low tide), the hull of the ship is more susceptible to the tidal current due to the low tide, and steering (maneuvering) Was sometimes difficult.

Japanese Unexamined Patent Publication No. 2006-330884 Japanese Unexamined Patent Publication No. 10-2049666

In the above-mentioned Patent Document 1, the predicted value of the tidal current data is calculated by using the tidal data by the astronomical tide at an arbitrary prediction point and the measured data of the tidal current, and the predicted value of the tidal current data is calculated according to the input condition value. It is intended to simulate the tidal current at the predicted point with reference.

Further, Patent Document 2 above assumes that the tide level of a port from the present to a predetermined time ahead is the astronomical tide level plus the deviation between the astronomical tide level of the past predetermined time and the measured tide position, and the tide level of the port. Is to predict. It also simulates the river water level up to a long time ahead based on past rainfall data.

Although it is possible to simulate various types of information using such conventional techniques, none of the documents considers the safe entry of a ship into a predetermined position.

An object of the present invention is to provide a management system and a management device capable of ensuring safety and managing efficient entry of a ship.

In order to achieve the above object, the management system of the present invention is provided at an observation position near the navigation route of the ship, and includes a wind speed meter for measuring wind condition information and a management device for managing the navigation of the ship. The management device determines whether or not to allow entry based on the tidal current calculation unit that calculates the tidal current at the observation position and the tidal current calculated by the tidal current calculation unit based on the wind condition information measured by the wind speed meter. The tidal current calculation unit includes a tidal component based on the tidal current harmony constant of the entry route environment in the wind condition information measured by the wind speed meter, and a tide generated by the wind represented by the wind condition information. At least the tide velocity is calculated based on the flow component of the ship and the inflow component from the river forming the entry route environment, and the determination unit relates to the tide velocity calculated by the tide calculation unit and the entry. It is characterized in that the permission or disapproval of navigation related to entry is determined based on the tidal velocity in the permissible tidal current that allows the influence of hull operation.

More preferably, in the management system of the present invention, the tidal current calculation unit calculates the tidal velocity when the tide level difference between the high tide and the low tide due to the tide is a low tide that does not satisfy the entry refusal tide level difference. And.

More preferably, in the management system of the present invention, the determination unit permits the navigation related to the entry by satisfying the tidal current velocity of the permissible tidal current with the tidal current velocity calculated by the tidal current calculation unit. And.

More preferably, in the management system of the present invention, when the tide level difference between the high tide and the low tide due to the tide is the ebb tide that satisfies the entry refusal tide level difference, regardless of the tide flow velocity calculated by the tidal current calculation unit. It is characterized by refusing navigation related to entry.

More preferably, in the management system of the present invention, when the tide level difference between the high tide and the low tide due to the tide is a low tide that does not satisfy the entry refusal tide level difference, the determination unit determines the permission or rejection of the entry based on the tide flow velocity. It is characterized in that a determination is made before the start of entry, and the permission or disapproval of navigation related to the entry based on the tide velocity satisfying the tide velocity of the allowable tidal current is determined during entry into the route.

More preferably, in the management system of the present invention, the tidal current calculation unit is represented by the tidal component based on the tidal current harmonization constant of the entry route environment in the wind condition information measured by the wind speed meter and the wind condition information. Based on the tide flow component generated by the wind and the inflow component from the river that forms the entry route environment, the tide flow direction is calculated together with the tide flow velocity, and the determination unit determines that the tide flow velocity is the allowable tidal current. It is characterized in that, in addition to satisfying the tidal current velocity in the above, it is determined whether or not to allow navigation related to entry based on the tidal current direction calculated by the tidal current calculation unit.

Further, the management system of the present invention is provided at an observation position near the navigation route of the ship, and uses a wind speed meter for measuring wind condition information, a management device for managing the navigation of the ship, and raw materials received from the ship. The control system includes a control device in a control system that controls the production of the energy substance by using the liquid in the production of the energy substance under the control of the control device, and discharges the used liquid from the tailrace. The management device enters the ship based on a tidal current calculation unit that calculates the tidal current at the observation position based on the wind condition information measured by the wind speed meter and a tidal current calculated by the tidal current calculation unit. It is equipped with a judgment unit for determining whether or not the navigation is permitted, and the tidal current calculation unit is based on the tidal component based on the tidal current harmonization constant of the entry route environment in the wind condition information measured by the wind speed meter and the wind condition information. At least the tide flow velocity is calculated based on the tide flow component generated by the represented wind and the inflow component from the river and the discharge channel forming the ship entry route environment, and the determination unit calculates the tide flow. It is characterized in that the permission or disapproval of navigation related to entry is determined based on the tide velocity calculated by the unit and the tide velocity in the allowable tide that allows the influence of the hull operation related to entry.

Further, the management device of the present invention includes a tidal current calculation unit that calculates the tidal current at the observation position and the tidal current calculation unit based on the wind condition information measured by the wind speed meter provided at the observation position near the route of the ship. It is provided with a judgment unit for determining whether or not to allow navigation related to entry based on the tidal current calculated by, and the tidal current calculation unit is represented by a tidal component based on the tidal current harmonization constant of the entry route environment and the wind condition information. At least the tide flow velocity is calculated based on the tide flow component generated by the wind and the inflow component from the river forming the ship entry route environment, and the determination unit is the tide flow velocity calculated by the tidal current calculation unit. The feature is that the permission or disapproval of navigation related to entry is determined based on the tidal velocity in the allowable tidal current that allows the influence of the hull operation related to the navigation.

More preferably, in the management device of the present invention, the determination unit relates to the entry based on the tide flow velocity when the tide level difference between the high tide and the low tide due to the tide is a low tide that does not satisfy the entry refusal tide level difference. It is characterized in that the permission or disapproval of navigation is determined before the start of entry, and the permission or disapproval of navigation related to the entry based on the tide velocity satisfying the tide velocity of the allowable tidal current is determined during entry into the route.

According to the present invention, there is an effect that safety can be ensured and efficient entry can be managed.

The figure which shows one Example of the management system and management apparatus in embodiment of this invention. The figure which shows the information about the area managed by the management system in embodiment of this invention. The figure which shows the enlarged part of the information about the area managed by the management system in embodiment of this invention. Another figure showing a part of the information about the area managed by the management system in the embodiment of the present invention. The block diagram which shows the detailed structure of the management apparatus which comprises the management system in embodiment of this invention. The figure which shows the tide level data used in the management system in embodiment of this invention. The figure which shows the entry permission result data of the navigation related to the entry using the management system in the embodiment of this invention. The flowchart which shows the detailed flow of the "entry decision processing" performed in the management apparatus of the management system in embodiment of this invention. The flowchart which shows the detailed flow of "advance arrival judgment processing" which constitutes a part of the entry judgment processing performed in the management apparatus of the management system in embodiment of this invention.

Hereinafter, an embodiment of the management system and the management device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing an embodiment of a management system and a management device according to an embodiment of the present invention.

In FIG. 1, the management system 1 sets a vessel carrying goods (luggage, cargo) such as goods, goods, and raw materials (raw materials) through a predetermined entry route (simply referred to as “route”) at a berth (also referred to as “route”). It is a system that controls navigation related to entry (berthing) into a berth), and is composed of at least a management device 100, one or a plurality of measuring devices 200.

Ships at this time include, for example, cargo ships such as tankers and container ships, passenger ships such as cruise ships and ferries, and other special ships, and these ships are placed at berths provided in the sea or lakes. By entering the ship, the berth enables the landing of the cargo carried by the ship. In addition, the berth is equipped with a receiving facility for landing the transported goods. This receiving facility is provided with carry-in devices such as a crane and an unloading arm, and these carry-in devices bring in, expropriate, or store the transported goods to the collection site.

One or a plurality of measuring devices 200 are provided in the vicinity of the entry route of the ship, and can measure various environmental information at the provided observation positions (measurement points). The measuring device 200 is composed of, for example, a wind direction anemometer that measures wind condition information such as wind speed and wind direction, a tide hygrometer that measures tide flow velocity, a wave height meter that measures wave height, and the like. It also includes an anemometer that measures information such as humidity. That is, examples of environmental information are wind condition information, tide velocity, wave height, and temperature / humidity.

Further, the management device 100 is a device that manages and controls the time and time of entering and leaving the ship and the route related to the navigation in the navigation related to the entry and exit of the ship. In particular, the management device 100 manages and controls the time of entry into the ship (also referred to as "timing of entry", "scheduled arrival time", and "at the time of entry") in the state of transporting the transported object.

In addition, the management device 100 is in a state of being able to communicate with the measuring device 200 by a communication line of a wired line or a wireless line, and is in a state of being able to communicate with the measuring device 200 at an arbitrary timing (“scheduled arrival time”, “predetermined time of scheduled arrival time” from the measuring device 200. In addition to "before" and the like, environmental information (which may include the position information of the observation position) is received (acquired) at regular time intervals (10 minutes, 30 minutes, 1 hour, 3 hours, etc.).

Then, based on the received environmental information, the management device 100 predicts (estimates) whether or not it is possible to enter the ship at a predetermined time before the scheduled arrival time, and determines whether or not the navigation related to the entry is permitted. Judgment The entry judgment process is performed.

This entry determination process is based on the tidal component based on the tidal current harmonized constant of the entry route environment in the environmental information received from the measuring device 200, particularly the wind condition information measured by the wind direction and anemometer in the measuring device 200, and the wind condition information. By calculating at least the tide velocity based on the tide component generated by the represented wind and the inflow component from the river that forms the entry route environment, this tide velocity is used at the scheduled entry time. This is the process of determining whether or not to enter the ship.

Further, a control system 2 is connected to the management system 1. This control system 2 is a system that enables the production of supplies by controlling various devices provided in a facility that uses the transported items after receiving the transported items by the ship at the receiving facility. In particular, the control system 2 receives raw materials (raw materials) as cargo from the ship that has entered the ship, and controls various control devices 300 provided in the facility to manufacture energetic materials using the received raw materials. Make a supply.

Hereinafter, a specific example of the processing performed by the control system 2 will be described.

The ship that entered the ship is a liquid gas tanker, and the liquid gas tanker carries liquefied natural gas (LNG) composed of methane, ethane, etc., and liquefied petroleum gas (LPG) composed of propane, butane, etc. ) Is being transported, the unloading arm of the receiving facility installed at the berth of the ship sucks up these liquefied gas (liquefied natural gas and liquefied petroleum gas) and puts them in the storage (LNG tank, LPG tank). Store.

In this case, in the control system 2, one or a plurality of control devices 300 constituting the control system 2 are pumps and vaporizers provided in the facility (specifically, “gas production facility” in this case). Controls the production and supply of gas (natural gas), which is an energy substance, from raw materials that are liquefied gas (liquefied natural gas and liquefied petroleum gas) stored in the storage by controlling equipment such as heat control devices. ..

In this control device 300, liquefied natural gas and liquefied petroleum gas stored in storage (LNG tank, LPG tank) are sucked up by a pump, and these liquefied gas are passed through a vaporizer (vaporizer) through a pipe. , This liquefied natural gas or liquefied petroleum gas is returned to gaseous natural gas, and the amount of heat that differs depending on the constituents of this natural gas is adjusted by a heat control device. By such processing, the control system 2 manufactures and supplies the necessary natural gas.

Of course, in this control system 2, in addition to these devices, many other devices are controlled by the control device 300 to stably produce and supply gas.

For example, in this control system 2, the boil-off gas generated in the LNG tank or the LPG tank is sucked by a gas compressor (BOG compressor), and the boil-off gas is sent to the reliquefaction device. Then, in this reliquefaction device, the boil-off gas is reliquefied, and the reliquefied liquefied gas is passed through the vaporizer. The natural gas produced by being returned to gas by this vaporizer is temporarily stored in a hangar called a holder, and if necessary, the odorant is deodorized by the gas and supplied to the demand source. At this time, the required pressure (high pressure, medium pressure, low pressure) is adjusted through a plurality of governors provided in various places, and the required amount of gas is supplied through the pipe by adjusting various adjusting valves.

Gas is produced and supplied by the control processing of each of the control devices 300 in the control system 2, and the vaporizer at this time is used to return the liquefied natural gas or the liquefied petroleum gas to the gaseous natural gas. , Water (seawater, groundwater, etc.) is flowing through the pipes through which these liquefied gases pass. The water used in this vaporizer shows an example of a liquid (liquid substance, liquid material), for example, seawater, lake water, groundwater, etc. taken in through an intake channel. Then, after use, these waters are discharged (drained) to the sea or lake through a drainage channel (drainage channel). The vaporizer at this time is just an example of a device that uses water, and in addition, the water used in a heat exchanger such as a condenser is also treated to discharge water in the same manner.

That is, it indicates that the water used in the equipment (vaporizer, condenser, etc.) controlled by the control device 300 of the control system 2 is discharged to the route on which the ship navigates. The water used in this vaporizer and condenser has a large capacity and is discharged and absorbed at high pressure in order to circulate this water efficiently, which is one of the factors that change the tidal current in the shipping route. There is.

In this way, when the control system 2 connected to the management system 1 absorbs or discharges water used for gas production based on the raw materials transported from the ship, the management device 100 constituting the management system 1 constitutes the management system 1. Then, it is also possible to carry out the entry decision processing in consideration of the influence of this water discharge. Specifically, as an argument for calculating the tide velocity in the entry determination process, the tide velocity is calculated by taking into account the inflow component from the discharge channel that forms the entry route environment.

FIG. 2 is a diagram showing information about an area managed by the management system according to the embodiment of the present invention.

FIG. 2 shows the boundary (coastline) between the land and the sea, and the land shows the river RV flowing into the sea (inside the bay). FIG. 2 shows a state in which five river RVs flow into the sea (inside the bay), and the management system 1 sets the scheduled entry time and navigation when the ship T sails to the berth provided in this bay. Manage and control the relevant route RT. In addition, in the vicinity of this berth, there is a facility that uses the cargo carried by the vessels moored at the berth, and the water discharge channel (including the water absorption channel, of course) that discharges the water used at this facility. It is shown.

An enlarged view of the berth and the vicinity of the facility shown in FIG. 2 is shown in FIG.

FIG. 3 shows a facility provided on land, the sea on which Vessel T navigates, a berth on which Vessel T navigating the sea to land a cargo to the facility, and a route RT for Vessel T to navigate. , Two measuring devices 200 provided on the sea near the route RT are shown.

The facility at this time is a gas production facility as shown above, and is composed of a management building provided with a management device 100 and a control device 300, a tank GT for storing liquefied gas, and the like.

Further, the berth is provided adjacent to this facility, and FIG. 3 shows an example in which the berth is composed of pier J and berth B. Further, another example of the configuration shown in FIG. 3 is shown in FIG. In FIG. 4, the pier J is not provided at the berth, the ship T is berthed at the berth B provided on the sea, and the berth B and the gas production facility are connected by a shield tunnel to land the transported object. Is shown.

In any of the configurations of FIGS. 3 and 4, ship T is shown to berth at this berth B. As shown in FIGS. 3 and 4, when the liquid gas tanker berths at berth B, the liquefied gas carried by the liquid gas tanker is sucked from the liquid gas tanker by the unloading arm and is inside the pier J or the shield tunnel. It is stored in the tank GT through the pipe provided in.

In FIGS. 3 and 4, the first measuring device 200A is shown at the point A near the route, and the second measuring device 200B is shown at the point B near the route, which is the measuring device 200. These measuring devices 200 are connected to the management device 100 provided in the management building via a communication line. As shown above, these measuring devices 200 measure environmental information such as wind condition information, tide flow velocity, wave height, temperature and humidity, and transmit them to the management device 100. Of course, the configuration may be such that a measuring device other than these is provided.

At this time, the sea surface on which the ship T is navigating repeatedly raises and lowers the tide level periodically due to a phenomenon called tide, and repeatedly raises and lowers about twice a day. When the sea level rises from high tide to low tide, the tide flows from the bay in the direction of the low tide of the open sea, while when the sea level falls from low tide to high tide, the sea level rises from the open sea. The tide flows in the direction of the rising tide in the bay. In this way, the tide level of the sea surface on which the ship navigates changes from moment to moment, and the tide flow also changes accordingly.

FIG. 5 is a block diagram showing a detailed configuration of a management device constituting the management system according to the embodiment of the present invention.

In FIG. 5, as shown above, the tide level on the sea surface changes from moment to moment, and the tide flow changes accordingly, and the ship T safely and efficiently enters (berths) the berth. The configuration of the functional block of the management device 100 that performs the processing for the purpose is shown.

In FIG. 5, the management device 100 is composed of a communication unit 101, a control unit 110, a storage unit 120, and an I / F unit 130. The communication unit 101 communicates with other devices (particularly, the measuring device 200 and the control device 300). The information transmitted and received by the communication unit 101 is transmitted to the control unit 110.

The control unit 110 performs main control in the management device 100, and includes an information control unit 111, a tide analysis unit 112, a tide flow calculation unit 113, and a ship entry determination unit 114. Further, the storage unit 120 includes a navigation information storage unit 121, a tide information storage unit 122, an environmental information storage unit 123, and a determination result storage unit 124. The I / F unit 130 includes an indicator unit 131 and a display unit 132.

The information control unit 111 receives information (tide level data) regarding the tide level on the ship's route from an external device provided in an external organization (public organization) via the communication unit 101 at a predetermined time, and the tide. It is stored in the information storage unit 122. The tide level data at this time is data that predicts the transition of the tide level based on the tide for each hour, and an example thereof is shown in FIG.

Further, the information control unit 111 receives wind condition information (wind speed, wind direction), tide flow velocity, wave height, temperature / humidity as environmental information from each of the measuring devices 200 via the communication unit 101 at an arbitrary time. These environmental information are stored in the environmental information storage unit 123 together with the time when they are received. At this time, the environmental information storage unit 123 stores the environmental information in association with the time, and also stores the position information of each of the measuring devices 200. Further, the environmental information storage unit 123 also stores the permissible tidal current, which is the tidal current that permits entry in the entry determination process, and the environmental information (particularly, the allowable wave height and the allowable wind speed) that permits entry in the entry determination process. The permissible tidal current at this time is a tidal current that allows the influence of ship operation (hull operation) related to entry.

A navigation information storage unit 121 is also connected to the information control unit 111, and the navigation information storage unit 121 stores information (navigation information) related to the navigation of the ship. This navigation information includes information on the scheduled arrival time for the ship to enter the berth, information on the berth identification information for identifying the berth to enter, and the like. The information control unit 111 is configured to receive (acquire) tide information and environmental information based on the scheduled arrival time included in the navigation information based on the navigation information stored in the navigation information storage unit 121. You may.

As described above, the navigation information storage unit 121 of the storage unit 120 provides navigation information including information on the scheduled arrival time for the ship to enter the berth and information on the berth identification information for identifying the berth to enter. I remember. In addition, the tide information storage unit 122 is in a state of storing tide level data that predicts the transition of the tide level based on the tide. Further, the environmental information storage unit 123 is in a state of storing the environmental information together with the time when it is received.

Subsequently, the instruction unit 131 of the I / F unit is composed of a touch panel, buttons, etc., and clocks a predetermined time (for example, a predetermined time before the scheduled arrival time) by a time measuring unit (clock, timer, etc.). Then, the control unit 110 is notified to that effect. At this time, the control unit 110 performs an entry determination process for determining whether or not the ship can safely enter the berth based on the information stored in the storage unit 120. In the above example, the entry determination process is performed by timing a predetermined time, but the entry determination process is not limited to this, and the entry determination process is performed in response to an instruction from the administrator via the instruction unit 131. You may do it.

The entry determination process performed by the control unit 110 will be described.

This entry judgment process is performed before the start of entry (berthing) (before the start of entry), before the scheduled arrival time, and also when entry is permitted and entry is started (continued). Do. In particular, the former is referred to as "advance entry determination processing", and the latter is referred to as "arrival continuation determination processing".
(Advance entry judgment processing)

In the control unit 110 that receives the instruction from the instruction unit 131, the tide analysis unit 112 first reads the tide information stored in the tide information storage unit 122 via the information control unit 111, and based on the read tide information. It is analyzed whether or not the tide is low (also called "low tide") at the scheduled arrival time. The analysis process of whether or not the tide is low at this time is analyzed based on whether or not the tide is the time of low tide (low tide time (low tide time)) from high tide to low tide based on the tide information. It is also called the rising tide time (rising tide time) when the tide is from low tide to high tide according to the tide information.

The ebb tide time can include an additional time until the tide reaches high tide, and by including this additional time, it is possible to judge whether or not safer navigation is possible (see FIG. 5).

If the scheduled arrival time is not low due to the analysis process by the tide analysis unit 112, the tide analysis unit 112 notifies the entry determination unit 114 to that effect. In this case, the entry determination unit 114 determines that entry is permitted because the scheduled entry time is not low. The entry determination unit 114 stores the determination result of the "entry permission" in the determination result storage unit 124.

In addition, when the scheduled arrival time is low due to the analysis process by the tide analysis unit 112, the tide analysis unit 112 subsequently sets the tide level difference at ebb tide to "dangerous tide level difference (ship refusal tide level) based on the tide information. Difference) ”is analyzed and the entry decision unit 114 is notified to that effect. The analysis process of whether or not the tide level difference at low tide satisfies the "dangerous tide level difference (ship refusal tide level difference)" performed by the tide analysis unit 112 at this time is when the tide level due to tide is from high tide to low tide. It is synonymous with determining whether or not the tide is low.

In the entry judgment unit 114, when the tide level difference at low tide satisfies the "dangerous tide level difference (entry refusal tide level difference)" (when the ebb tide is from high tide to low tide), that is, "dangerous tide level difference (entry). Refusal tide level difference) ”or higher tide levels will occur, and a decision will be made to refuse entry. The entry determination unit 114 stores the determination result of this "entry refusal" in the determination result storage unit 124. In other words, this means that the tidal current calculation unit 113 does not calculate the tidal current, but the entry is permitted, and even if the tidal current is calculated, the navigation related to the entry is refused regardless of the tidal current (tide velocity). It is shown that.

On the other hand, when the tide level difference in the ebb tide does not satisfy the "dangerous tide level difference (ship refusal tide level difference)" (when the ebb tide is different from the ebb tide when the storm surge is low to low tide), that is, the "dangerous tide level difference ( In the case of a low tide where the tide level is not higher than the tide level difference), the tide analysis unit 112 then determines whether the low tide is the "low tide" from the next high tide to the high low tide. To analyze. In the above example, analysis is performed as to whether or not the ebb tide is the "ebb tide" from the next high tide to the high low tide after the low tide, but the management is not limited to this and is managed via the indicator 131. It may be determined that the tide is "low tide" from the next high tide to the high and low tide after the low tide.

If it is not a "low tide" from the next high tide to the high low tide after the low tide, the tide analysis unit 112 notifies the entry determination unit 114 to that effect. In this case, the entry determination unit 114 determines that the entry is permitted because the scheduled entry time is low, but it is not a condition for refusing entry. The entry determination unit 114 stores the determination result of the "entry permission" in the determination result storage unit 124.

When the ebb tide is the "ebb tide" from the next high tide to the high and low tide after the low tide, the tide analysis unit 112 notifies the tidal current calculation unit 113 to that effect. At this time, the tidal current calculation unit 113 calculates the tidal current at the scheduled arrival time for each point by using the environmental information received from each point. In the above example, in the case of a low tide in which a tide level equal to or higher than the “dangerous tide level difference (ship refusal tide level difference)” does not occur, the tide analysis unit 112 subsequently determines that the low tide is from the next high tide to the high low tide. The tidal current calculation unit 113 calculates the tidal current at the scheduled arrival time when it is this "low tide" by analyzing whether or not it is the "low tide", but it is not limited to this, and it is not limited to this. The tidal current may be calculated regardless of the result of the analysis process of whether or not the tide is "low tide" from high tide to high low tide.

As a result, it is possible to enter the ship when the "dangerous tide level difference (difference in tide level for refusal to enter the ship)" is not satisfied, with a higher probability than when performing the analysis process.

The tidal current at this time is composed of the tidal current direction in addition to the tidal current velocity shown above, and the tidal current calculation unit 113 calculates at least the tidal current velocity. The tidal current calculation unit 113 uses an arithmetic expression as shown in the following (Equation 1).

(Equation 1)
H (t) = A0 + Σfn × Hn × cos {θn × t − Kn + (v0 + u) n} + blown flow component + average flow component

This (Equation 1) is the tidal component based on the tidal current harmony constant of the entry route environment in the environmental information received from the measuring device 200, particularly the wind condition information measured by the wind direction and anemometer in the measuring device 200, and the wind condition information. A calculation formula that calculates the tidal current H (t) based on the tidal current component (wind flow component) generated by the wind represented by and the average flow component (inflow component) from the river that forms the entry route environment. is there. The tidal components based on the tidal current harmonization constant are the average water surface or average flow A0 at each point, the astronomical coefficient fn of the day when the environmental information was measured, the amplitude Hn of the harmony constant, each velocity θn, the retard angle Kn of the harmony constant, and the environment. It is calculated by the astronomical argument v0 of the day when the information is measured and each tide n.

The tidal current calculation unit 113 calculates at least the tidal current velocity by using the above calculation formula (Equation 1). Then, by sending the calculated tide flow velocity to the entry determination unit 114, the entry determination unit 114 determines whether or not to allow entry at the scheduled entry time using this tide velocity.

At this time, the entry determination unit 114 reads out the allowable tidal current stored in the environmental information storage unit 123, and determines whether or not to allow entry at the scheduled entry time from the allowable tidal current and the tidal current (tide flow velocity) calculated by the tidal current calculation unit 113. to decide.

The permissible tidal current at this time is the same as the information on the permissible tidal current (allowable tidal current flow) used in the process of determining whether or not it is possible to continue the embarkation during the continuation of the embarkation, or the permissible tidal current (allowable tidal current velocity). ) Is a slower value (smaller value). More preferably, the permissible tidal current (allowable tidal current velocity) is slower (smaller) than the permissible tidal current (permissible tidal current velocity) used in the process of determining whether or not it is possible to continue entering the ship while the ship is still entering.

The entry determination unit 114 determines that entry is permitted when the tidal current (tide flow velocity) calculated by the tidal current calculation unit 113 satisfies the allowable tidal current. The entry determination unit 114 stores the determination result of the "entry permission" in the determination result storage unit 124. For this reason, the entry determination unit 114 permits navigation related to entry by satisfying the tidal velocity calculated by the tidal current calculation unit 113 satisfying the tidal velocity of the allowable tidal current.

On the other hand, the entry determination unit 114 determines that the entry is refused when the tidal current (tide velocity) calculated by the tidal current calculation unit 113 does not satisfy the allowable tidal current. The entry determination unit 114 stores the determination result of this "entry refusal" in the determination result storage unit 124.

In addition, the process of determining whether or not the tidal current (tide velocity) calculated by the tidal current calculation unit 113 by the ship entry determination unit 114 satisfies the permissible tidal current is determined for each environmental information at each point. If the tidal current (tide flow velocity) calculated based on the environmental information at the point satisfies the allowable tidal current, navigation related to entry shall be permitted, and the tidal current (tide velocity) calculated based on the environmental information at at least one point shall be permitted. If the tide is not satisfied, it is possible to refuse the navigation related to the entry (see the entry permission / rejection result (1) in FIG. 7). Of course, the present invention is not limited to this, and if the tidal current (tide velocity) calculated based on the environmental information at at least one of the points satisfies the permissible tidal current, the navigation related to the entry may be permitted (the entry in FIG. 7). Permit result (2)).

As a result, there are cases where entry is permitted even if the tide is low based on the environmental information and the tidal current based on the environmental information, compared to the one that simply refuses entry at the time of low tide that affects the navigation of the ship. Therefore, the efficiency of entry into the ship will be improved while ensuring safety.
(Continued entry judgment process)

When the indicator unit 131 of the I / F unit clocks the scheduled arrival time by the timekeeping unit, the instruction unit 131 notifies the control unit 110 to that effect. At this time, the control unit 110 performs a ship entry determination process (particularly, a ship entry continuation determination process) for determining whether or not the ship can safely enter the berth based on the information stored in the storage unit 120. Do. Of course, as in the above, the entry decision processing is performed by timing the scheduled arrival time, but the entry determination process is not limited to this, and the entry determination process is performed in response to an instruction from the administrator via the instruction unit 131. May be good.

At this time, in the control unit 110, the information control unit 111 acquires the environmental information from the measuring device 200 and sends the environmental information to the ship entry determination unit 114. At this time, the entry determination unit 114 determines whether or not this environmental information satisfies the information such as the allowable tidal current, the allowable wave height, and the allowable wind speed stored in the environmental information storage unit 123, and continues the navigation related to the entry. Decide whether to stop or stop.

Specifically, when the tidal velocity of the environmental information acquired from the tidal current meter of the measuring device 200 satisfies the permissible tidal current, the navigation related to the entry is continued, and when it is not satisfied, the entry is stopped. Further, when the wind speed of the environmental information acquired from the wind speed anemometer of the measuring device 200 satisfies the allowable wind speed, the navigation related to the entry is continued, and when the wind speed is not satisfied, the entry is stopped. Further, when the wave height of the environmental information acquired from the wave height meter of the measuring device 200 satisfies the allowable wave height, the navigation related to the entry is continued, and when the wave height is not satisfied, the entry is stopped.

Of course, also in this case, if all the environmental information is satisfied, the navigation related to the entry may be continued, and if at least one environmental information is not satisfied, the entry may be stopped.

By performing the entry determination process including the advance entry determination process and the entry continuation determination process, it is possible to manage safe navigation not only before the entry but also during the entry.

FIG. 6 is a diagram showing tide level data used in the management system according to the embodiment of the present invention.

The tide level data shown in FIG. 6 is data provided by an external organization, and is data that predicts the transition of the tide level based on the tide when the horizontal axis is time and the vertical axis is tide level.

The tide level data shown in FIG. 6 shows that high tide and low tide are periodically repeated by the tide on a daily basis. Among them, this tide level data becomes high tide at [t1] time, low low tide at [t2] time, low high tide at [t3] time, and high tide at [t4] time due to unequal day tide. It shows that the tide will be low. Of these, low tide occurs when the tide changes from high tide to low tide. This ebb tide is particularly likely to affect the navigation of ships. In the example shown in FIG. 6, the time zone from the time of [t1] to the time of [t2] and the time zone from the time of [t3] to the time of [t4] are the time zones of ebb tide (shown above, "Ebb tide time").

In FIG. 6, during the ebb tide time from the high tide which is the time of [t1] to the low tide which is the time of [t2], the tide level difference between the high tide level and the low low tide level causes the navigation of the ship. It indicates a state that satisfies the "dangerous tide level difference (also referred to as" entry refusal tide level difference ")" that is judged to have a high possibility of danger. In addition, during the low tide time, which is the time of [t3] and the high and low tides of [t4], the tide level difference between the low tide level and the high and low tide level is this "dangerous tide level difference". Indicates a state that does not satisfy. The "dangerous tide level difference" can be appropriately set according to the size of the ship entering the ship.

In other words, when the storm surge is the time of [t1] and the tide is low and the tide is low, which is the time of [t2], the entry judgment process rejects the navigation related to the entry regardless of the tide velocity. Judge that. In addition, when the tide changes from low tide, which is the time of [t3], to high and low tide, which is the time of [t4], the entry timing is based on the tidal current component, the blowing flow, and the average flow in the entry judgment process. Based on this tide, it is determined to be either "entry permit" that permits navigation related to entry or "denial of entry" that refuses navigation related to entry.

The ebb tide time at this time may include an additional time, which is a predetermined time immediately before the high tide, which is the time from the low tide to the high tide. This enables safer navigation related to the entry of vessels.

FIG. 7 is a diagram showing entry permission / rejection result data for navigation related to entry using the management system according to the embodiment of the present invention.

The entry permission / rejection result data shown in FIG. 7 shows four types of results. FIG. 7 shows the result of permission / rejection of entry when the “tide (tide velocity)” of the allowable tidal current is set to “1.00” or more in the entry determination process. The tidal current velocity of this permissible tidal current is merely an example, and for example, the tidal current velocity of the permissible tidal current may be "0.6" or more, "0.4" or more, or the like. However, as shown above, the tidal current of the permissible tidal current at this time is the information of the permissible tidal current (permissible tidal current) used in the process of determining whether or not the ship can continue to enter the ship during the continuation of the ship. It is the same or a value slower (smaller value) than the allowable tidal current (allowable tidal current velocity).

The entry permission / denial result data shown in FIG. 7 are all four types (No. 1) to (No. 4). These entry permission / denial result data show the tide flow velocity and tide direction calculated in the entry decision processing, and also show the entry permission / denial result by comparing this information with the allowable tidal current (allowable tide flow velocity). ing.

In addition, the entry permission / rejection result data shows two results, and shows each judgment condition showing how to comprehensively judge the entry result judged for each point. The entry permit result (1) is the entry permit result that permits entry if the entry result at all points satisfies the allowable tidal current (allowable tide flow velocity) (entry allowed (○)) among the entry permit results judged for each point. This is the result when it is judged as a permission condition (first entry permission condition). On the other hand, the entry permission result (2) indicates that the entry result at at least one point among the entry permission results judged for each point satisfies the allowable tidal current (allowable tidal current velocity) (entry allowed (○)). , It is the result when it is judged as the entry permission condition (second entry permission condition) that permits entry.

First, the entry permission / rejection result data shown in FIG. 7 (No. 1) shows that the tide flow velocity at the point A is "0.25" and the tide direction is "east", and the tide flow velocity at the point B. Is "0.3", indicating that the tidal current direction is "east-southeast". This means that the tidal currents at points A and B both satisfy the permissible tidal current (allowable tidal current). For this reason, both the entry permission result (1) and the entry permission result (2) comprehensively permit navigation related to entry (entry permission).

Next, the entry permission / denial result data shown in FIG. 7 (No. 2) shows that the tidal velocity at point A is "0.25" and the tidal current direction is "east", and the tidal current at point B. It indicates that the speed is "1.05" and the tidal current direction is "east-southeast". This is because only the tidal current at point A satisfies the permissible tidal current (allowable tidal current), and therefore, as a result of admission / rejection (1) based on the first entry permission condition, navigation related to entry is totally refused (entry). Refusal). On the other hand, as a result of permission or denial of entry (2) based on the second entry permission condition, navigation related to entry is generally permitted (entry permission).

Further, the entry permission / rejection result data shown in FIG. 7 (No. 3) shows that the tide flow velocity at the point A is "1.25" and the tide flow direction is "east", and the tide flow velocity at the point B. Is "0.3", indicating that the tidal current direction is "east-southeast". Since only the tidal current at point B satisfies the permissible tidal current (permissible tidal current), as the result of admission / rejection (1) based on the first entry permission condition, the navigation related to the entry is totally refused (entry refusal). There is. On the other hand, as a result of permission or denial of entry (2) based on the second entry permission condition, navigation related to entry is generally permitted (entry permission).

As described in (Part 2) and (Part 3) above, the result may differ depending on the entry permission conditions.

Finally, the entry permission / denial result data shown in FIG. 7 (No. 4) shows that the tidal velocity at point A is "1.25" and the tidal current direction is "east", and the tidal current at point B. It indicates that the speed is "1.05" and the tidal current direction is "east-southeast". This is because the tidal currents at both points A and B do not meet the allowable tidal current (allowable tidal current). For this reason, both the entry permission / rejection result (1) and the entry permission / rejection result (2) are comprehensively denied navigation related to entry (entry refusal).

FIG. 8 is a flowchart showing a detailed flow of the “ship arrival determination process” performed in the management device of the management system according to the embodiment of the present invention.

In FIG. 8, the entry judgment process is performed before the ship starts entering the berth (berthing) through the route (before the start of entry) (before the start of entry), and the entry continuation determination performed when the entry starts. It consists of processing.

First, the management device 100 determines whether or not it is a predetermined time before the scheduled arrival time (S701). Until a predetermined time before the scheduled arrival time (NO in S701), the management device 100 performs a process of determining whether or not the scheduled arrival time has been reached as shown in S705 described later. Further, when it is determined that the predetermined time before the scheduled arrival time has come (YES in S701), the management device 100 subsequently performs the advance entry determination process (S702). The details of this advance entry determination process are shown in FIG.

Next, the management device 100 determines whether or not "entry permission" is set as a determination result by this advance entry determination process (S703). In addition, it is possible to set multiple times as a predetermined time before the scheduled arrival time, and by performing the advance arrival judgment processing at each time, it is possible to make a judgment according to the ever-changing situation. It becomes.

If it is determined by this determination process that "entry permit" has not been set (NO in S703), the management device 100 relates to a new entry by changing the scheduled entry time registered at the present time. Perform navigation management (S712). On the other hand, when it is determined that the "entry permit" is set (YES in S703), the management device 100 registers information on the tidal current such as the tidal velocity calculated by this pre-entry determination process (YES). S704). That is, the fact that this "entry permit" is set and the information on the tidal current such as the tidal velocity, which is the judgment condition when this entry permit is set, are registered (memorized) in association with each other.

Subsequently, the management device 100 determines whether or not the scheduled arrival time has come (S705). Until the scheduled arrival time is reached (NO in S705), the process is shifted to S701 in order to temporarily stop the entry determination process. That is, in the embarkation judgment process, it is shown that a predetermined process (immigration continuation determination process or advance entry determination process) is performed depending on whether it is the scheduled arrival time or the predetermined time before the scheduled entry time. There is.

When the management device 100 determines that the scheduled arrival time has come (YES in S705), the tidal current velocity at the scheduled arrival time is acquired from the tidal current meter which is the measuring device 200 provided at the observation position (S706), and further, the observation position. The wave height at the scheduled arrival time is acquired from the wave height meter which is the measuring device 200 provided in the above (S707).

Then, the management device 100 determines whether or not it is possible to continue entering the ship from these "tide flow velocity at the scheduled arrival time acquired from the tidal current meter" and "wave height at the scheduled arrival time acquired from the wave height meter". Process (S708). In the judgment process at this time, for example, when the tide velocity is equal to or higher than the predetermined tide velocity, or when the wave height is higher than the predetermined wave height, and the time elapsed since the start of entry is started. Immediately after, etc. is determined, and in this case, the decision to stop entering the ship is made.

When it is determined by this determination process whether or not the entry can be continued (S709) and it is determined that the entry can be continued (YES in S709), the management device 100 subsequently completes the entry. It is determined whether or not it is in the state (S710). When the ship entry is completed (YES in S710), the management device 100 registers the information (tide flow velocity, wave height, etc.) measured during the continuation of the ship entry as a condition for the entry (S711). On the other hand, if the entry is not completed (NO in S710), the management device 100 is in a standby state until the entry is completed. Of course, instead of this, if information such as tide velocity and wave height is appropriately acquired from the tidal current meter and wave height meter, it is possible to continue entering the ship based on this information until the arrival of the ship is completed. The process (S708) for determining the presence or absence may be repeated (FIG. 8 shows the process for the latter case).

If it is not determined that the entry can be continued (NO in S709), the management device 100 manages the entry of the vessel by changing the entry route registered at the present time (S712). At this time, the judgment result in the entry judgment process becomes the result of "rejection of entry" or "interruption of entry", and the judgment condition when the result is obtained is registered (memorized) together with these results (S713).

Through the above processing, the management device 100 can enable safe navigation of the ship and efficient entry into the ship.

FIG. 9 is a flowchart showing a detailed flow of the “advance entry determination process” that constitutes a part of the entry determination process performed in the management device of the management system according to the embodiment of the present invention.

In FIG. 9, the advance entry determination process performed by the management device 100 starts before a predetermined time before the scheduled entry time.

First, the management device 100 reads out the tide information related to the tide stored in advance (S801). Then, based on this tide information, the management device 100 determines whether or not the tide is in a “low tide” state at the arrival timing of the scheduled arrival time (S802). The ebb tide time used to determine whether or not the tide is in the ebb tide state at this time may include an additional time as shown above.

When the management device 100 does not determine that the tide is in the "low tide" state at the time of arrival at the scheduled arrival time (NO in S802), the management device 100 sets "entry permission" to permit navigation related to entry (S810). On the other hand, when it is determined that the tide is in the "low tide" state at the arrival timing of the scheduled arrival time (YES in S802), the management device 100 subsequently determines that the maximum tide level difference that occurs in the low tide state is ". It is determined whether or not the “dangerous tide level difference (dangerous tide level difference)” is satisfied and the “dangerous tide level difference” or more is satisfied (S803).

When the maximum tide level difference that occurs in the ebb tide state is equal to or greater than the "dangerous tide level difference" that satisfies the "dangerous tide level difference (entry refusal tide level difference)" (YES in S803), the management device 100 refuses navigation related to entry. "Rejection of entry" is set (S811). On the other hand, in the management device 100, when the maximum tide level difference generated in the ebb tide state does not satisfy the "dangerous tide level difference (ship refusal tide level difference)" and is less than the "dangerous tide level difference" (NO in S803), subsequently. Based on the tide information, it is determined whether or not the tide is low from high tide to low tide (S804). The process of determining whether or not there is a low tide from high tide to low tide based on this tide information is not necessarily a necessary configuration, and the maximum tide level difference is the "dangerous tide level difference (ship refusal tide level difference)". It may be synonymous with the state of low tide from high tide to low tide. The tide level data shown in FIG. 6 describes the case with these as synonyms.

When it is determined by this determination process that the tide is low from high tide to low tide (YES in S804), the management device 100 sets "rejection of entry" to reject navigation related to entry (S811). If it is not determined that the storm surge is in a low tide to low tide (NO in S804), the management device 100 is subsequently in a "low tide" state from the next high tide to the high low tide after the low tide. Whether or not it is determined (S805).

When the management device 100 does not determine that the state is "low tide" from the next high tide to the high low tide after the low tide (NO in S805), the management device 100 sets "entry permission" to permit navigation related to entry (S810). .. Further, when it is determined that the state is "low tide" from the next high tide to the high low tide after the low tide (YES in S805), the management device 100 receives the wind condition information from the measuring device 200 at each observation position. The "wind speed" and "wind direction" are read out as the wind condition information (S806).

Then, the management device 100 uses the calculation formula (Equation 1) as shown above based on each component of the tidal current component, the blowing flow, and the average flow based on the read wind condition information "wind speed" and "wind direction". The tidal current at the time of arrival at the scheduled arrival time is calculated by (S807). Subsequently, the management device 100 compares the “calculated tidal current (A)” with the “pre-designated permissible tidal current (B)” (S808).

When the "calculated tidal current (A)" is equal to or greater than the "pre-designated permissible tidal current (B)" by comparing the "calculated tidal current (A)" with the "pre-specified permissible tidal current (B)". Therefore, it is determined whether or not it is determined that the ship can be entered at the time of arrival at the scheduled arrival time (S809). As a result, when it is determined that the ship can be entered at the arrival timing at the scheduled arrival time (YES in S809), the management device 100 sets the “entry permission” that permits the navigation related to the entry (S810). On the other hand, when it is not determined that the ship can be entered at the arrival timing at the scheduled arrival time (NO in S809), the management device 100 sets "rejection of entry" to refuse the navigation related to the entry (S811).

In the above processing, before the judgment processing in S803 and the judgment processing in S804 are performed to calculate the tidal current at the time of entry based on each component of the tidal current component, the blowing flow, and the average flow as shown in S807. By executing this, the processing related to the calculation of this tidal current can be minimized, and the processing load can be reduced.

It should be noted that the processing in S803 and S804 is not limited to such a processing order, and is executed by determining that it is possible to enter the ship in the processing indicating whether or not it is possible to enter the ship, as shown in S809. It may be a configuration. In this case, regardless of the tide flow velocity calculated by the process shown in S807, if the tide level difference between the high tide and the low tide due to the tide is a low tide that satisfies the tide level difference, the navigation related to the entry will be refused. ..

The embodiment shown above is an embodiment of the present invention, and is not limited to these examples, and can be appropriately modified and implemented without changing the gist thereof.

100 Management device 101 Communication unit 110 Control unit 111 Information control unit 112 Tide analysis unit 113 Tide flow calculation unit 114 Immigration judgment unit 120 Storage unit 121 Navigation information storage unit 122 Tide information storage unit 123 Environmental information storage unit 124 Judgment result storage unit 130 I / F section 131 Indicator section 132 Display section 200 Measuring device 300 Control device

Claims (9)

An anemometer, which is installed at the observation position near the ship's route and measures wind condition information,
It is equipped with a management device that manages the navigation of the ship.
The management device is
A tidal current calculation unit that calculates the tidal current at the observation position based on the wind condition information measured by the anemometer, and
It is equipped with a judgment unit that determines whether or not to enter the ship based on the tidal current calculated by the tidal current calculation unit.
The tidal current calculation unit
The tidal component based on the tidal current harmony constant of the entry route environment in the wind condition information measured by the anemometer, the tide component generated by the wind represented by the wind condition information, and the entry route environment are formed. At least the tide velocity is calculated based on the inflow component from the river.
The judgment unit
A management system characterized in that navigation is determined based on the tidal current velocity calculated by the tidal current calculation unit and the tidal current velocity in the permissible tidal current that allows the influence of hull operation related to ship entry. The tidal current calculation unit
The management system according to claim 1, wherein the tide flow velocity is calculated when the tide level difference between the high tide and the low tide due to the tide is a low tide that does not satisfy the entry refusal tide level difference. The judgment unit
The management system according to claim 1 or 2, wherein the tidal current velocity calculated by the tidal current calculation unit satisfies the tidal current velocity of the permissible tidal current to permit navigation related to the entry of a ship. The judgment unit
The first aspect of claim 1, wherein when the tide level difference between the high tide and the low tide due to the tide is a low tide that satisfies the tide level difference, the navigation related to the entry is refused regardless of the tide velocity calculated by the tidal current calculation unit. Management system. The judgment unit
When the tide level difference between the high tide and the low tide due to the tide is a low tide that does not satisfy the tide level difference, the permission or disapproval of the entry based on the tide flow velocity is judged before the start of entry.
The management system according to claim 1, wherein the permission or disapproval of navigation related to the entry based on the tide velocity satisfying the tide velocity of the allowable tidal current is determined during entry into the shipping route. The tidal current calculation unit
The tidal component based on the tidal current harmonization constant of the entry route environment in the wind condition information measured by the anemometer, the tide component generated by the wind represented by the wind condition information, and the entry route environment are formed. Based on the inflow component from the river, the tidal current direction is calculated together with the tidal velocity.
The judgment unit
Claims 1 to 5, wherein the tidal current velocity satisfies the tidal current velocity in the permissible tidal current, and the permission or disapproval of navigation related to entry is determined based on the tidal current direction calculated by the tidal current calculation unit. The management system described in either. An anemometer, which is installed at the observation position near the ship's route and measures wind condition information,
A management device that manages the navigation of the ship and
It is equipped with a control device in a control system that controls the production of energetic materials using the raw materials received from the ship.
The control system
A liquid is used in the production of the energetic material under the control of the control device, and the used liquid is discharged from the drainage channel.
The management device is
A tidal current calculation unit that calculates the tidal current at the observation position based on the wind condition information measured by the anemometer, and
It is equipped with a judgment unit that determines whether or not to allow navigation related to entry based on the tidal current calculated by the tidal current calculation unit.
The tidal current calculation unit
The tidal component based on the tidal current harmonized constant of the entry route environment in the wind condition information measured by the wind speed meter, the tide component generated by the wind represented by the wind condition information, and the entry route environment are formed. At least the tidal velocity is calculated based on the inflow components from the river and the tailrace.
The judgment unit
A management system characterized in that navigation is determined based on the tidal current velocity calculated by the tidal current calculation unit and the tidal current velocity in the permissible tidal current that allows the influence of hull operation related to ship entry. A tidal current calculation unit that calculates the tidal current at the observation position based on the wind condition information measured by the anemometer provided at the observation position near the ship's route.
It is equipped with a judgment unit that determines whether or not to allow navigation related to entry based on the tidal current calculated by the tidal current calculation unit.
The tidal current calculation unit
At least the tidal current based on the tidal component based on the tidal current harmonization constant of the entry route environment, the tidal flow component generated by the wind represented by the wind condition information, and the inflow component from the river forming the entry route environment. Calculate the speed,
The judgment unit
A management device characterized in that it determines whether or not to allow navigation related to entry based on the tidal velocity calculated by the tidal current calculation unit and the tidal velocity in the allowable tidal current that allows the influence of hull operation related to the navigation. The judgment unit
When the tide level difference between the high tide and the low tide due to the tide is a low tide that does not satisfy the tide level difference, the permission or disapproval of navigation related to the entry based on the tide flow velocity is determined before the start of entry.
The management device according to claim 8, wherein the tide flow velocity determines whether or not to allow navigation related to the entry based on satisfying the tide flow velocity of the allowable tidal current during entry into the shipping route.

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