JP2019104390A - Maneuvering method using high mobility propulsion device - Google Patents

Abstract

To provide a high mobility propulsion device for a vessel such as a low speed pilot boat which is comparatively small sized requiring a high level maneuvering performance such as a harbor work barge.SOLUTION: A high mobility propulsion device for a vessel is characterized by including: a jet stream propeller composed of two bow nozzles and two bow flow control valves on a bow of a boat, three port-side nozzles and three port-side flow control valves on a port side of the boat, three starboard side nozzles and three starboard flor control valves on a starboard side of the boat, and three stern nozzles and three stern flow control valves on a stern of the boat; pumps and pipes for supplying stream to a water inlet arranged on a bottom of the boat and the jet stream propeller; and a controller for controlling supplied water amount and discharge direction of the jet stream propeller.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a highly mobile propulsion device for a relatively small-sized, low-speed ship, such as a harbor work ship, which requires high maneuvering performance, and a ship maneuvering method using the same.

A water jet propelling device has been developed and commercialized as a device for discharging water to a pump and using it as a thrust. The water jet propulsor obtains a forward thrust by the reaction of the discharged water and moves forward, and is a device for maneuvering a ship using a vectored nozzle and a thrust reverser.
As a technique regarding a water jet propulsion boat, the thing of Unexamined-Japanese-Patent No. 10-236389 is known.

  The disclosure of Japanese Patent Application Laid-Open No. 10-236389 relates to an invention entitled "Tugboat powered by a water jet", and "Affixing several propellers to a disk attached to a vertical shaft, and changing the direction of these propellers. The conventional tugboat propulsion devices, such as the ones provided with a propeller in the nozzle and the direction of the propeller together with the nozzle, all change the direction of the propulsion device (propeller) located in the water, It is usually inconvenient to operate the controlled vessel in all directions, and it is inconvenient to operate the vessel in all directions, and the structure is complicated, and in the case of a nozzle propeller, in particular, the nozzle has the propeller performance. In order to solve the problems of the prior art such as “harm” (see the same specification, paragraphs 0002 and 0003), “the bottom of the hull 1 is provided with a water jet water suction port, A water jet pump 4 is installed in a suction duct 3 communicating with the suction port, and the other end of the suction duct 3 is connected to a plurality of injection nozzles 2 provided on a deck via an on-off valve 7 (See the description of claim 1 of the patent publication and the like), “... Can operate the tug boat in a desired direction, and the water jet suctioned by the suction pump The energy of water can be used as a total thrust, and it can be manufactured inexpensively with a simple structure consisting of a water jet water suction pump, a jet nozzle and an on-off valve provided in the circuit, and to operate as a tug boat The operation is also extremely simple, and has an effect such as having a superior effect as compared with the conventional device (see paragraph [0013] in the same patent specification).

  However, the tugboat disclosed in Japanese Patent Application Laid-Open No. 10-236389 is originally for pushing the shore side of a large ship to berth, and there is a problem with high maneuvering performance. That is, the tugboat etc. which are disclosed in Japanese Patent Application Laid-Open No. 10-236389 have a relatively large output and can not be turned small, for example, a comparison where the maneuvering performance is required at high altitude such as a pilot boat for a pilot to board the ship It was unsuitable for small and low speed ships.

Japanese Patent Application Laid-Open No. 10-236389

  Therefore, in view of the problem in the advanced maneuvering performance of the tugboat disclosed in JP-A-10-236389, a relatively small, low-speed pilot boat for which maneuvering performance is required at high altitudes such as harbor work vessels etc. And a maneuvering method using the same.

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is a relatively small type that requires high maneuvering performance such as a harbor working ship, etc., and a small size used for quick rescue of low speed pilot boats and strangers. In a high mobility propulsion device for a boat mounted on a boat, two bow nozzles and a bow flow control valve on the bow of the boat, and three bow nozzles and a bow flow on each of the port and starboard sides of the boat Jet water jet propulsion device comprising a control valve and three stern nozzles and stern flow control valves at the stern of the boat, a water intake port disposed at the bottom of the boat, and a pump for supplying water flow to the jet water jet propulsion device And a pipe, and a control device that controls the amount of water supplied to the jet water jet thruster and the discharge direction.
In the invention according to claim 2 of the present application, each of the two bow nozzles and the bow flow control valve at the bow, the three weir nozzles and the weir flow control valve at the port side and the starboard side of the boat The method according to claim 1, further comprising: a jet water flow propulsion device comprising three stern nozzles and three stern flow control valves at the stern of the vessel, the vessel maneuvering method by the high mobility control device for vessels according to claim 1, The water is discharged in the stern direction only from the stern nozzle disposed at the stern to advance the vessel forward, and in the case of "reverse", the water flow is directed only from the bow nozzle disposed at the bow. The ship 1 is discharged backward to move in the stern direction, and in the case of the ship "fine speed adjustment", the water flow is discharged from the two bow nozzles and the water flow is discharged from the two sterns to carry the ship 1 Stay in the field In the case of ship "right turn", the ship is made to discharge water flow from the three stern nozzles and discharge the water flow from the port side nozzle on the bow side disposed on the port side. 1. Turn the ship 1 to the right, and in the case of vessel "left turn", discharge the water flow from the three stern nozzles and discharge the water flow from the starboard side nozzle located on the starboard side of the starboard side. 1. Turn the vessel 1 to the left, and in the case of vessel “in-place turn”, discharge the water flow from the starboard side nozzle located on the starboard side bow side with the port side located on the port side stern side In the case of vessel "fixed point maintenance", 1 is turned on the spot, and in addition to the two bow nozzles and the two stern nozzles at both ends of the stern, the two port sides of the two arranged at the port sides From the nozzle and the starboard side nozzles arranged at the starboard side both ends The ship 1 is discharged so as not to move the ship 1 from the place, and in the case of the ship “transverse movement”, the three jets of the port side nozzle discharge the water flow to make the ship 1 parallel to the left side of the port. The boat maneuvering method of a boat, wherein the boat is moved and the jet of water flow is discharged from the three port side nozzles and the three stern nozzles at the time of the boat "slippage forward".

Since the present invention is configured as described above, the following effects can be obtained.
(1) It is similar to a water jet propulsor to obtain thrust using reaction of water, but the high maneuvering maneuvering which is difficult with the following conventional vessels is realized by the nozzles arranged on the four circumferences of the vessel. It has the effect of being possible.
(2) It becomes possible to maintain a fixed point, turn in place, move laterally, maintain and adjust speed, maintain heading during drift, etc.
(3) In addition, since there is no driving device such as a propeller on the outboard, there is no risk of a catching accident such as a mooring rope. In addition, it is possible to safely rescue the victims.
(4) By not having propeller-like propellers, it is possible to design vessels with extremely shallow drafts, which can be used for vessels navigating rivers, lakes, atolls, etc. in addition to ports. .

FIG. 1 is a view showing an outline of a first embodiment of a high mobility propulsion device for a boat for implementing the device for high mobility propulsion of a boat according to the present invention. 2 (a) to 2 (i) are diagrams showing an outline of a ship maneuvering method using the high mobility propulsion device for a ship according to the first embodiment.

  An embodiment will be described in detail based on the drawings as an embodiment for implementing a high mobility propulsion device for a ship according to the present invention.

  FIG. 1 is a view showing an outline of a first embodiment of a high mobility propulsion device for a vessel for carrying out a high mobility propulsion device for a boat according to the present invention, and in FIG. Ships 2a and 2b: bow nozzles 3a, 3b and 3c: port side nozzles 4a, 4b and 4c: starboard side nozzles 5a, 5b and 5c: stern nozzles 6a and 6b: bow Flow control valves 7a, 7b and 7c are port side flow control valves 8a, 8b and 8c are starboard side flow control valves 9a, 9b and 9c are stern flow control valves 10 is a water intake port 11 , A pump, 12, an intake pipe, 13, a ship completion pipe, 14, a weir side pipe, 15, a control device, and a control signal line.

  The ship 1 on which the high mobility propulsion device for a ship according to the first embodiment is mounted is, as described above, a relatively small-sized, low-speed pilot boat or a boatman whose ship handling performance is required at high altitudes such as harbor work ships. It assumes a relatively small ship that does not cause any damage to itself, such as a small boat used for quick rescue of the

As is clear from FIG. 1, the high mobility propulsion device for a ship according to the first embodiment includes the nozzles 2a, 2b, 3a, 3b,... 5a, 5b, 5c disposed around the ship 1. 9a, 9b, 9c, and in the high mobility propulsion device for a ship according to the first embodiment, the nozzles 2a, 2b, 3a, 3b,. .. 5a, 5b, 5c and the flow control valves 6a, 6b... 9a, 9b, 9c respectively constitute a jet water jet propulsion device as a set, and the pipes 13 connected respectively It is comprised so that the output of the said pump 11 from 14 may be adjusted and the water flow from each nozzle 2a-5c may be discharged. The bow nozzles 2a and 2b are disposed on the left and right of the bow of the bow of the ship 1, and the port side nozzles 3a, 3b and 3c and the starboard side nozzles 4a, 4b and 4c are each arranged in order from the bow on the port side nozzle 3a. , 3b, 3c, starboard nozzles 4a, 4b, 4c, and three stern nozzles 5a, 5b, 5c are respectively provided on the port side, starboard side, and stern center, respectively, in the central part and on both sides. The nozzles 2a to 5c are disposed at predetermined intervals, and the nozzles 2a to 5c are installed so as to be directed at a predetermined angle.
Moreover, these nozzles 2a-5c are arrange | positioned on ship side ship, and the discharge water flow from a nozzle is injected on a draft surface, and it is arrange | positioned so that it may become thrust.

The pump 11 can also adjust the outflow amount, and the flow rates discharged from the nozzles 2a to 5c are finely adjusted by the flow rate adjustment valves 6a to 9c. As a result, the water flow discharged from each of the nozzles 2a to 5c is configured such that the direction and the water flow rate can be freely adjusted.
And control of the direction and water flow velocity of each of these nozzles 2a-5c, from each control signal line 16 from the control device 15 along each of the pipes 13, 14, each nozzle 2a-5c and each water flow adjustment valve 6a ~ It is sent to 9c, and controls the water flow rate and direction of the nozzles 2a-5c and the flow control valves 6a-9c.

That is, a plurality of nozzles 2a to 5c are arranged around the four circumferences of the ship 1, and the water is taken in using the pump 11 from the water intake port 10 provided on the ship bottom, and the pipes 12 to 14 respectively By guiding and discharging the connected nozzles 2a to 5c, it is configured to obtain a ship propulsion force, a turning force, and a reverse force.
In the high mobility propulsion device for a ship according to the first embodiment shown in FIG. 1, only one pump 11 is disposed. However, a plurality of pumps (not shown) are mounted. It is also preferable to adjust the propulsive force, the turning force, and the reverse force by controlling the number of pumps used and the discharge amount of the pump according to the pump capacity thereof. That is, the nozzles 2a to 5c are connected to the pipes 13 and 14 via the flow rate adjusting valves 6a to 9c, and further, from the control device 15 laid along the pipes 13 and 14 The control signal 1 can be controlled from the control signal line 16 to control or adjust the discharge amount (thrust) of each of the nozzles 2a to 5c.

(Ship maneuvering method using the high mobility propulsion device for a vessel according to the first embodiment)
Fig.2 (a)-(i) is a figure which shows the outline of the ship maneuvering method using the high mobility propulsion apparatus of the ship based on the present Example 1, and Fig.2 (a) is "advancement" of a ship. Figure 2 (b) shows the maneuvering method for “reverse”, Figure 2 (c) shows the maneuvering method for “slow speed adjustment”, and Figure 2 (d) shows “right 2 (e) is the maneuvering method for “turn left”, FIG. 2 (f) is the maneuvering method for “situ turnaround”, FIG. 2 (g) is the maneuvering method for “turning”. 2 (h) is a schematic diagram showing the marine vessel maneuvering method in the case of "lateral movement", and FIG. 2 (i) is a schematic diagram showing the marine vessel maneuvering method in the case of "side slip advance". .

  In FIG. 2 (a)-(i), 2a-5c are each nozzle arrange | positioned around the said ship 1 shown in FIG. 1, and are shown in the center of the ship 1 of FIG. 2 (a)-(i). The arrow indicates the maneuvering direction of the ship 1.

  As shown in FIGS. 2 (a) to 2 (i), for example, in the marine vessel maneuvering method at the time of “forward” of the ship shown in FIG. 2 (a), the three stern nozzles 5a, 5b, From 5c, the water flow is discharged in the stern direction to move the ship 1 forward in the bow direction, and in the case of the marine vessel maneuvering method in "reverse" shown in FIG. 2 (b), the two bow nozzles 2a, 2b disposed on the bow The water flow is discharged in the bow direction to reverse the ship 1 in the stern direction, and in the marine vessel maneuvering method at the time of "fine speed adjustment" in FIG. 2C, the water flow is discharged from the two bow nozzles 2a and 2b. With the two stern nozzles 5a and 5c, it is possible to maneuver the vessel finely by discharging water from the two stern nozzles 5a and 5c to keep the vessel 1 in place, etc. In the case of the maneuvering method in "right turn" shown in FIG. Discharging the water flow from the three stern nozzles 5a, 5b, 5c and the left side The water flow is discharged from the nozzle 3a to turn the ship 1 in the right direction, and in the marine vessel maneuvering method in the case of "left turn" shown in Fig. 2 (e), the water flow is discharged from the three stern nozzles 5a, 5b, 5c. At the same time, the watercraft is discharged from the starboard side nozzle 4a to turn the ship 1 in the left direction, and in the case of the "in-place turnaround" shown in FIG. 2 (f), the starboard side together with the portside nozzle 3c. In the marine vessel maneuvering method at the time of "maintaining a fixed point" shown in FIG. 2 (g), the two sterns 2a, 2b, and two sterns of the stern are driven by discharging the water flow from the nozzles 4a and turning the ship 1 in place. In addition to the nozzles 5a and 5c, water is discharged from the two starboard nozzles 4a and 4c to the two port side nozzles 3a and 3c so that the ship 1 does not move from the site, as illustrated in FIG. In the case of the maneuvering method in the case of “lateral movement” shown In the case of the boat maneuvering method in the case of "advanced skidding forward" shown in Fig. 2 (i), the three left ports are driven by discharging the water flow from the port side nozzles 3a, 3b, 3c to move the ship 1 parallel to the left side of the port. By performing the water stream discharge from the side nozzles 3a, 3b, 3c and the three stern nozzles 5a, 5b, 5c, it is possible to maneuver each ship, such as moving the ship 1 diagonally to the right.

The marine vessel maneuvering method shown in FIGS. 2 (a) to 2 (i) does not show all the marine vessel maneuvering methods, but the appropriate nozzle 2a to 5c discharges the water flow, and the other "reverse turning" or It is possible to maneuver the ship such as “slip and reverse”.
The marine vessel maneuvering method shown in FIGS. 2 (a) to 2 (i) enables marine vessel maneuvering by controlling the nozzles 2a to 5c and the flow control valves 6a to 9c in the control unit 15, but The above-described boat maneuvering steps are executed by the boat maneuvering computer (not shown) and the boat maneuvering program (not shown) incorporated in advance, without adjusting each of the nozzles 2a to 5c, etc. Naturally, it may be possible to maneuver a ship.

  Furthermore, the control device 15 may be a control device 15 that can use so-called GPS (Global Positioning System) for obtaining position information from GPS satellites (Global Positioning Satellite), and by configuring as such, for example, By controlling the nozzles 2a to 5c and the like from GPS position information such as a person who is floating or a person who is drifting, it is possible to expect an effect such as enabling quick life saving. In particular, the use as a small boat for such life saving reduces the risk of damaging a rescuee by a conventional screw or propeller, and secures safety.

  The present invention is used by being mounted on a relatively small low speed pilot boat or a small boat for rescue of a person.

1 Ship equipped with high maneuverability propulsion device 2a, 2b Bow nozzle 3a, 3b, 3c Port side nozzle 4a, 4b, 4c Right side nozzle 5a, 5b, 5c Stern nozzle 6a, 6b Bow flow control valve 7a, 7b, 7c Left side Side flow control valve 8a, 8b, 8c Right-hand side flow control valve 9a, 9b, 9c Stern flow control valve 10 Intake 11 Pump 12 Intake pipe 13 Success pipe 14 Bottom side piping 15 Control device 16 Control signal line

The present invention relates to a boat maneuvering method using a low speed, high mobility propulsion device, such as a harbor working vessel, which requires a high degree of maneuverability.

Therefore, in view of the problem in the advanced maneuvering performance of the tugboat disclosed in JP-A-10-236389, a relatively small, low-speed pilot boat for which maneuvering performance is required at high altitudes such as harbor work vessels etc. Etc. It is an object of the present invention to provide a maneuvering method using a high mobility propulsion device such as

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is directed to two bow nozzles and a bow flow control valve at the bow respectively, and three bow side nozzles and a weir flow control valve on the port side and the starboard side respectively. A jet flow propulsor comprising three stern nozzles and three stern flow control valves at the stern, an intake port disposed at the bottom of the stern , a pump and piping for supplying a water flow to the jet propulsor, and the jet flow propel And a control device for controlling the amount of water supplied to the aircraft and the direction of discharge of the vessel, the vessel maneuvering method by the high maneuvering propulsion device of the vessel, wherein the vessel "forwards" only flows water from the stern nozzle disposed at the stern Is discharged in the direction of the stern to move the ship forward in the direction of the bow, and in the case of ship "reverse", the flow of water is discharged in the direction of the bow only from the bow nozzle disposed on the bow to reverse the ship in the direction of the stern In the case of the vessel “fine speed adjustment”, the vessel is made to be a fine maneuvering that discharges the water flow from the two bow nozzles and discharges the water flow from the two sterns and keeps the vessel in place. In the case of "swing", the water flow is discharged from the three stern nozzles and the water flow is discharged from the port side nozzle on the bow side disposed on the port side to turn the ship rightward, and the ship "left turn" At the same time, the water flow is discharged from the three stern nozzles and the water flow is discharged from the starboard side nozzle disposed on the bow side of the starboard side to turn the ship leftward, In the case of "turning head", a water flow is discharged from the starboard side nozzle arranged on the starboard side bow side together with the port side located on the port side stern side, and the vessel is turned on the spot to maintain the ship "fixed point" For the two bow nozzles and In addition to the stern nozzles at both ends of the base stern, the two jets from the port-side nozzles arranged at the port-side ends and the starboard-side nozzles arranged at the starboard-side ends prevent the ship from moving out of place In the case of the ship “transverse movement”, the three jets of water are discharged from the port side nozzle to move the ship in parallel in the lateral direction of the port side, and in the case of the ship “skidding forward” A method of operating a boat, comprising: discharging the water stream from the port side nozzle and the three stern nozzles of the base.

The present invention relates to a boat maneuvering method using a low speed, high mobility propulsion device, such as a harbor working vessel, which requires a high degree of maneuverability.

Therefore, in view of the problem in the advanced maneuvering performance of the tugboat disclosed in JP-A-10-236389, a relatively small, low-speed pilot boat for which maneuvering performance is required at high altitudes such as harbor work vessels etc. Etc. It is an object of the present invention to provide a maneuvering method using a high mobility propulsion device such as

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is directed to two bow nozzles and a bow flow control valve at the bow respectively, and three bow side nozzles and a weir flow control valve on the port side and the starboard side respectively. A jet flow propulsor comprising three stern nozzles and three stern flow control valves at the stern, an intake port disposed at the bottom of the stern , a pump and piping for supplying a water flow to the jet propulsor, and the jet flow propel And a control device for controlling the amount of water supplied to the aircraft and the direction of discharge of the vessel, the vessel maneuvering method by the high maneuvering propulsion device of the vessel, wherein the vessel "forwards" only flows water from the stern nozzle disposed at the stern Is discharged in the direction of the stern to move the ship forward in the direction of the bow, and in the case of ship "reverse", the flow of water is discharged in the direction of the bow only from the bow nozzle disposed on the bow to reverse the ship in the direction of the stern In the case of the vessel “fine speed adjustment”, the vessel is made to be a fine maneuvering that discharges the water flow from the two bow nozzles and discharges the water flow from the two sterns and keeps the vessel in place. In the case of "swing", the water flow is discharged from the three stern nozzles and the water flow is discharged from the port side nozzle on the bow side disposed on the port side to turn the ship rightward, and the ship "left turn" At the same time, the water flow is discharged from the three stern nozzles and the water flow is discharged from the starboard side nozzle disposed on the bow side of the starboard side to turn the ship leftward, In the case of "turning head", a water flow is discharged from the starboard side nozzle arranged on the starboard side bow side together with the port side located on the port side stern side, and the vessel is turned on the spot to maintain the ship "fixed point" For the two bow nozzles and In addition to the stern nozzles at both ends of the base stern, the two jets from the port-side nozzles arranged at the port-side ends and the starboard-side nozzles arranged at the starboard-side ends prevent the ship from moving out of place In the case of the ship “transverse movement”, the three jets of water are discharged from the port side nozzle to move the ship in parallel in the lateral direction of the port side, and in the case of the ship “skidding forward” A method of operating a boat, comprising: discharging the water stream from the port side nozzle and the three stern nozzles of the base.

The present invention relates to a boat maneuvering method using a low speed, high mobility propulsion device, such as a harbor working vessel, which requires a high degree of maneuverability.

Therefore, in view of the problem in the advanced maneuvering performance of the tugboat disclosed in JP-A-10-236389, a relatively small, low-speed pilot boat for which maneuvering performance is required at high altitudes such as harbor work vessels etc. Etc. It is an object of the present invention to provide a maneuvering method using a high mobility propulsion device such as

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application includes two bow nozzles and a bow flow control valve at the bow respectively, three bow side nozzles and three weir flow control valves on the port side and the starboard side , Jet water jet propulsion device comprising three stern nozzles and stern flow control valves at the stern, a water intake arranged at the bottom of the ship, pump and piping for supplying water flow to the jet water jet propulsion device, and the jet water jet thruster A ship maneuvering method by a high mobility propulsion device for a vessel having a control device for controlling the amount of water supplied to the vessel and the discharge direction , wherein the vessel "forwards" includes water flow only from a stern nozzle disposed at the stern Discharge in the stern direction to move the ship forward in the bow direction, and in the case of ship "backward movement", the water flow is discharged in the bow direction only from the bow nozzle disposed on the bow to reverse the ship in the stern direction In the case of the vessel “fine speed adjustment”, the vessel is made to be a fine maneuvering that discharges the water flow from the two bow nozzles and discharges the water flow from the two sterns and keeps the vessel in place. In the case of "swing", the water flow is discharged from the three stern nozzles and the water flow is discharged from the port side nozzle on the bow side disposed on the port side to turn the ship rightward, and the ship "left turn" At the same time, the water flow is discharged from the three stern nozzles and the water flow is discharged from the starboard side nozzle disposed on the bow side of the starboard side to turn the ship leftward, In the case of "turning head", a water flow is discharged from the starboard side nozzle arranged on the starboard side bow side together with the port side located on the port side stern side, and the vessel is turned on the spot to maintain the ship "fixed point" For the two bow nozzles and In addition to the stern nozzles at both ends of the base stern, the two jets from the port-side nozzles arranged at the port-side ends and the starboard-side nozzles arranged at the starboard-side ends prevent the ship from moving out of place In the case of the ship “transverse movement”, the three jets of water are discharged from the port side nozzle to move the ship in parallel in the lateral direction of the port side, and in the case of the ship “skidding forward” A method of operating a boat, comprising: discharging the water stream from the port side nozzle and the three stern nozzles of the base.

Claims (2)

In a relatively small, low-speed pilot boat, such as a port work ship, etc., which requires high maneuvering performance, and a small boat, which is used for prompt rescue of a passenger, etc.
Two bow nozzles and bow flow control valves on the bow of the boat, three bow nozzles on the port and right side of the boat, and three sterns at the stern of the boat A jet flow propulsion device comprising a nozzle and a stern flow control valve;
An intake arranged at a bottom of the boat, a pump and a pipe for supplying a water flow to the jet water flow propelled device;
A control device that controls the amount of water supplied to the jet water jet propulsion device and the discharge direction;
A high mobility propulsion device for a ship characterized by having: Two bow nozzles and bow flow control valves on the bow and three bow nozzles on the port and starboard sides of the boat, and three stern nozzles and stern on the stern of the boat The method according to claim 1, further comprising a jet flow propulsion device including a flow control valve.
At the time of ship "advance", the water flow is discharged in the stern direction only from the stern nozzle arranged at the stern to advance the ship forward, and at the time of ship "reverse", the bow arranged at the bow The water flow is discharged from the nozzle only in the bow direction to reverse the ship 1 in the stern direction, and in the case of the vessel "fine speed adjustment", the water flow is discharged from the two bow nozzles and the water flow from the two sterns. The vessel is discharged finely to keep the vessel 1 in place, and when the vessel "turns right", the three stern nozzles discharge the water flow and the left side of the bow arranged on the port side A water flow is discharged from the side nozzle to turn the ship 1 in the right direction, and in the case of a ship "left turn", the water flow is discharged from the three stern nozzles and the right side arranged on the bow side of the right side Discharge the water flow from the side nozzle and ship 1 In the case of the vessel “in-place turn head”, the vessel 1 is discharged by discharging water from the starboard side nozzle disposed on the starboard side bow side together with the portside located on the portside stern side. In the case of vessel "fixed point maintenance", in addition to the two bow nozzles and the two stern nozzles at the two aft end sides, the two port side nozzles disposed at the two boat sides and A water flow is discharged from the starboard side nozzles arranged at the starboard side both ends so as to maneuver the ship 1 from moving in place, and when the ship "transversely moves", the water flow is discharged from the three port side nozzles The ship maneuvering method of moving the ship 1 in parallel in the lateral direction of the port side and performing water jet discharge from the three port side nozzles and the three stern nozzles in the case of the ship "slip-forward movement".

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