WO2001059941A1

WO2001059941A1 - Urgent signal transmitting small-sized transmitter and early distress locating system

Info

Publication number: WO2001059941A1
Application number: PCT/JP2000/006256
Authority: WO
Inventors: Shinichi Sawada
Original assignee: Universal Resource, Inc.
Priority date: 2000-02-09
Filing date: 2000-09-13
Publication date: 2001-08-16
Also published as: AU2000273117A1

Abstract

A position computation unit (23) computes a current position based on a signal received by a GPS receiving unit (21) from a GPS (Global Positioning System) satellite (22), and a transmission unit (24) transmits a distress signal including preset distress information and the current position information computed by the position computation unit (23). This urgent signal transmitting transmitter (20), using an algorithm transmitter, can be reduced in size and weight and is convenient to carry. Since the transmitter (24) transmits a distress signal based on a GMDSS distress signal regulation, a GMDSS rescue system can be used in rescuing victims to enable quick rescuing activities covering the entire globe.

Description

Specification

Emergency signal transmission small transmitter and distress early detection systemThis application is based on Japanese Patent Application No. 2000 No. 7 1 2 7 7 and Japanese Patent Application No. 2000 1 0 4 0 7 1 As a basis, its content is included here as a quote. Technical field

The present invention relates to a small transmitter for transmitting an emergency signal, which is convenient to carry, and an early distress detection system for detecting a victim by relaying a signal transmitted by the small transmitter using an artificial satellite. Background art

Conventionally, Morse code has been known as a means of communication in case of a marine accident. Recently, the Global Maritime Distress Snd Safety System (GMDS) using satellites has been used. This was decided at the 1st General Assembly of IM0 (International Maritime Organization) in 1979 as a global maritime distress safety system. It has been in full operation since February.

Figure 1 is a diagram to explain the concept of GMDSS. In GMDSS, polar orbiting satellites (Cospas satellite satellites) and geosynchronous orbiting satellites (Inmarsat ίHayajoshi) are referred to Signals from emergency signal transmitters 3 such as EPIR β (Emergency position-indicating radio beacon) are transmitted to ground stations 1 and 2 using EIR. Therefore, it has the advantage that it can power the entire earth.

However, the communication equipment used for GMDSS has the problem that the equipment is large and expensive for personal use, and the installation of such transmission equipment is limited to ships and marine equipment. Therefore, when a marine accident occurs and an occupant is thrown into the sea, the search and rescue of the occupant is carried out by a ship or an aircraft, etc. Extremely difficult in stormy weather You. Furthermore, in the case of a maritime accident related to marine leisure, the location of the victim is often not clear, and it takes a lot of money and time to find the victim, and in many cases, the victim cannot be found.

In addition, since GMDSS uses an existing ELT (Emergency locator transmitter) or marine EPIRB together with a combination of VHF and medium wave (MF), a measurement error of about 20 km occurs due to frequency stability. Distress signal information is transmitted to the ground stations 1 and 2 via satellites, and the position of the transmitter 3 is determined by the ground stations 1 and 2. As a result, it took a long time to determine the position.

In addition, malfunction of the transmitter has been pointed out as a problem of GMDSS. The transmitter used for GMDSS is configured to transmit a signal when the installed transmitter is moved. For this reason, many people who do not understand the concept of starting the transmitter, such as moving the transmitter at the time of repair of the ship, etc. It is thought that it is happening because there is no recognition that the event has occurred. Disclosure of the invention

An object of the present invention is to provide a small transmitter for transmitting an emergency signal which is convenient for carrying and, by using the transmitter and the GMDSS, to locate a victim carrying the transmitter. The aim is to provide a rescue and rescue system that can quickly identify and grasp the situation, and to speed up and improve the efficiency of the emergency rescue and rescue operations of the victims and improve the survival rate.

In order to achieve the above object, in the transmitter for transmitting an emergency signal according to the present invention, the position calculation unit calculates the transmitter position based on the position information signal of the satellite for the satellite positioning system received by the reception unit, and the manual operation unit When is operated, the distress signal including the predetermined distress information and the current position information calculated by the position calculation unit is transmitted from the distress signal transmission unit. Since the emergency signal transmitting transmitter includes the current position information in the distress signal, it is possible to accurately recognize the position of the victim.

In addition, the emergency signal transmitter is connected to the receiver, position calculator and distress signal transmitter. It consists of a main unit including a remote controller and a remote controller, and transmits a distress signal by operating the manual operation unit of the remote controller. Therefore, for example, a relatively large body is installed on a ship, and the crew only needs to carry the remote control unit, which is excellent in portability. Even if there are a large number of occupants, it is economical because only the remote control unit needs to be prepared for the number of occupants.

In addition, a substrate on which an electronic member including a receiving unit, a position calculating unit, a transmitting unit, and a battery is mounted, and a ground wire are included in the foamed member. The case can reduce the size and weight of the transmitter. As a result, the transmitter can be carried as a PLB (Personal locator beacon).

By wearing such an emergency signal transmission transmitter, it is possible to easily transmit distress signals in the event of an emergency such as distress, and by receiving this distress signal, quick rescue operations can be performed. be able to. Further, since the distress signal is not transmitted unless the manual operation unit is operated, erroneous transmission can be prevented. Also, in the distress signal transmission prohibited area, it is configured not to transmit the distress signal even if the manual operation unit is operated.

Also, by including the transmitter-specific ID information in addition to the distress information and the transmitter location information in the distress signal, the victim can be easily recognized, and the person concerned of the victim can be recognized. Contact can be made quickly.

In addition, the distress signal transmitted from the transmitter is based on the Global Maritime Distress snd Safety System (GMDSS) distress signal rules, so that the GMDSS rescue system can be used to rescue the victims. It can be carried out. In such a distress early detection system, the distress signal transmitted from the transmitter includes location information and ID information unique to the transmitter. Distress information can be reported to the organization to which the victim belongs based on the ID information, and quick rescue operations can be performed. In addition, since the distress signal is relayed using an artificial satellite, it is possible to realize a quick rescue operation covering the whole earth. BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a conceptual diagram of GMD S S.

Figure 2 is a conceptual diagram of the Argos system.

FIG. 3 is a diagram illustrating a schematic configuration of a transmitter and an early distress detection system according to the present invention.

FIG. 4 is a diagram showing a specific example of the transmitter 20.

FIG. 5 is a diagram illustrating a distress early detection system using ID information. FIG. 6 is a diagram illustrating transmission of distress signals and prohibition of transmission based on the position of the transmitter.

FIG. 7 is a diagram showing a first embodiment of a small transmitter for transmitting an emergency signal.

FIG. 8A is a diagram showing a mounting example of the transmitter 20 shown in FIG.

FIG. 8B is a diagram showing another mounting example of the transmitter 20 shown in FIG.

FIG. 9 is a diagram illustrating a second embodiment of the transmitter.

FIG. 1OA is a diagram showing a third embodiment of the transmitter, and is a diagram showing a case where the transmitter is mounted on a life jacket.

FIG. 10B is a diagram showing a third embodiment of the transmitter, and shows a case where the transmitter is mounted on a buoyancy adjuster for scuba diving.

FIG. 11 is a diagram illustrating a fourth embodiment of the transmitter.

FIG. 12 is a diagram showing a fifth embodiment of the transmitter.

FIG. 13 is a diagram showing a modification of the transmitter of FIG.

FIG. 14 is a diagram showing a modification of the transmitter of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described using a PLB (personal locator beacon) as an example. The distress early detection system according to the present invention provides a small-sized brassier that has not been able to benefit from the GMD SS by providing a portable ultra-small transmitter while using the above-mentioned GMD SS rescue system. In this way, users, small fishing boats, anglers and surfers can send distress signals to the GMD SS in an emergency. By the way, apart from the above-mentioned GMDSS, there is a so-called Argos System (Argos System), which is a satellite-based position calculation and data collection system. Figure 2 is a conceptual diagram of the Argos system. The Argos system is a position calculation and data collection system for environmental surveys and environmental protection, and is used to calculate the position and collect data for tide measurement buoys 4, wild birds 5, marine animals 6, and polar explorers 7. This is done using satellite 9. The satellite 9 uses two N 0 AA satellites orbiting in polar orbit, and the NOAA satellite 9 is equipped with Argos processing equipment.

A transmitter 8 for the Argos system is mounted on each of the mobile bodies 4 to 7, and the radio wave emitted from the transmitter 8 is received by the artificial satellite 9 and transferred to the receiving station 10 on the ground. The information received by the receiving station 10 is sent to the information processing center 11, where the position of the transmitter 8 is calculated and the sensor data is processed, and then delivered to the user 12.

The transmitter 8 used in this Argos system is small and lightweight, and most of them are 1 kg or less. In particular, in the case of a transmitter to be mounted on the wild bird 5, the weight of the transmitter must be reduced to about 4 to 5% of the weight of the wild bird 5, and thus the weight has been reduced. No. 10-32 499 discloses a micro transmitter of about 15 g. In the distress early detection system according to the present invention, the GMDSS can be used by an individual by using the micro transmitter used in the Argos system.

FIG. 3 is a diagram for explaining a schematic configuration of a transmitter 20 and a distress early detection system according to the present invention. The transmitter 20 has a distress signal transmission function and a GPS function. Reference numeral 21 denotes a GPS receiver for receiving signals from a GPS (Global Positioning System) satellite 22. The position calculator 23 detects a transmitter 20 based on the GPS signal received by the GPS receiver 21. Is calculated. This position calculation is performed at a predetermined cycle, and the calculated position information is output to the transmission unit 24. The transmitter 24 uses the above-mentioned ultra-small transmitter for the Argos system.As a result, the overall size and weight of the transmitter 20 can be reduced in size and weight, and can be carried as a PLB. can do. In the early distress detection system of the present invention, the Cospas-Sasat system (international satellite search and rescue system) used for GMDSS is used. Low orbit satellites are used. For this reason, the transmitter 24 has a frequency of 400 MHz based on the specification for COSPAS-SARSAT 406 MHz distress beacons, C / S T.OOl issue 3-revision2 October 1998. And 121.5 MHz distress signal transmission. The signal at frequency 406 MHz is the distress signal received by satellite 27, while the signal at frequency 121.5 MHz is used to facilitate the location of the ship or person in distress. The transmitter 20 also functions as a radar transbonder. Reference numeral 26 denotes a power source such as a small battery, and reference numeral 25 denotes an operation switch for transmitting an distress signal. Since the transmitter 20 is used on the ocean, it is manufactured with consideration given to waterproofness, pressure resistance, corrosion resistance, and the like.

FIG. 4 is a diagram showing a specific example of the transmitter 20. On the circuit board 200, the electronic components 201, 202, 203 constituting the GPS receiving section 21, the position calculating section 23, the transmitting section 24, and the battery 204, which is the power supply 26, are provided. The antenna 205 is fixed, and one end of a ground wire 206 is connected. These electronic components 201 to 203, the battery 204 and the ground wire 206 are included in the foam member 207.The foam member 207 is made of urethane or styrene. . A metal conductive layer 208 for shielding electromagnetic waves is provided around the foamed member 207, and an insulating layer 209 is provided so as to surround the metal conductive layer 208. The operation switch 25 is provided outside the insulating layer 209.

An aluminum sheet or the like is used for the metal conductive layer 208, and a resin applied around the metal conductive layer 208 is used as the insulating layer 209. The tip of the ground wire 206 is taken out of the foam member 207 and connected to the metal conductive layer 208. The foam member 207, the metal conductive layer 208 and the insulating layer 209 have a function as a case of the transmitter 20. Most of the foam member 207 is a foam member 207. The weight of the transmitter 20 can be reduced. In addition, since the electronic components 201 to 203 battery 204 is included in the foam member 207, the waterproofness is excellent. Returning to FIG. 3, as the information to be included in the distress signal transmitted from the transmitting unit 24, only the distress information used in the conventional Cospas® satellite system may be used. Only the position information calculated in 3 may be used, or both may be included. Further, ID information of the transmitter 20 may be included. The ID information is a data (for example, a number) given to the transmitter 20 when the transmitter 20 is purchased, and the ID information and the purchaser's name and the contact information are transmitted to the distress system. It is registered with the controlling organization (for example, Coast Guard 29, described later).

The distress signal transmitted from the transmitter 20 is received by the Cospa's Sursat satellite 27 orbiting the earth. The received distress signal information is stored in the memory module of the communication processor (for frequency 406 MHz) mounted on the artificial satellite 27, and the artificial satellite 27 transmits the LUT (Local user terminal) 28 on the ground. When the desired position is reached, satellite 27 sends a distress signal to the ground.

In Japan, this LUT 28 is handled by the Japan Coast Guard distress signal ground receiving station, and distress information is sent from the receiving station 28 to the Japan Coast Guard 29 coastal department via the department in charge of the Japan Coast Guard 29. Sent to. Receiving the distress information, the Coast Guard Coast Guard 30 issues a rescue order to the rescue aircraft 31 and the rescue boat 32 to rescue the distress who is the owner of the transmitter 20. At this time, a cooperative system including general ships will be established. For example, when the distress signal includes position information, the rescue aircraft 31 and the rescue ship 32 can go straight to the distress position based on the position information. In addition, even if the position of the victim changes due to the current, the location information changes according to the change in the position of the victim, so that the victim is not lost. This can contribute to an increase in the survival rate and a significant reduction in the cost of rescue.

Also, when the above-mentioned ID information is included in the distress signal, the distressed person can be identified from the ID information, so that the distressed person can be quickly notified of the distress information. For example, as shown in Figure 5, the ID number of the crew of a ship belonging to shipping company 33 is 100s, and the ID number of the crew of a ship belonging to shipping company 34 is 200s. The Security Service 29 sends the distress information to the shipping company 33 when the ID is 100s, and sends the distress information to the shipping company 3 when the ID is 200s. Send to 4. If the distress signal of ID 101 is transmitted from the victim A, the distress information is transmitted to the shipping company 33 via the ground receiving station 28 and the Japan Coast Guard 29, and transmitted from the victim B. The distress information of ID 201 is transmitted to shipping company 34.

In the above-described example, the force of transmitting the two types of distress signals (406 MHz, 121.5 MHz) from the transmission unit 24 by operating the operation switch 25 ⁵ , A medium-wave or short-wave signal may be transmitted instead of the 121.5 MHz distress signal. The distress signal at 406 MHz is transmitted to the Coast Guard 30 at the route shown in Figure 3, while the distress signal at 121.5 MHz, medium and short waves is directly transmitted. It will be received by the Japan Coast Guard Coast Office 30 or by a cruise ship staying near the victim, so that rescue operations in various areas can be performed more quickly. Alternatively, only the distress signal of 406 MHz may be transmitted.

In addition, a separate switch from the operation switch 25 is provided, and the operation signal of the operation switch 25 causes the distress signal of 406 MHz, and the operation of the other switch causes the operation of the switch 1 2 1. A distress signal of 5 MHz, medium wave, or short wave may be transmitted. At this point, when the distress information is included, the power consumption required to transmit the distress signal is larger than when it is not included, so the distress signal including the distress information only when the operation switch 25 is turned on. By transmitting, the power consumption can be suppressed and the battery life can be improved.

Also, a signal of 406 MHz including position information and ID information is constantly transmitted, and only when the operation switch 25 is operated in an emergency, the predetermined distress information is included in addition to the position information and ID information. The transmitter 20 may be set to transmit a distress signal. At all times, if the location information and ID information are transmitted to the shipping companies 33, 34 via the Japan Coast Guard 29, the shipping companies 33, 3 4 The position can always be grasped. For example, if the fishing boat does not return after the expected return time, it is possible to take a quick response such as conducting a search based on the position information, thereby preventing a serious accident from occurring.

By the way, as for the personal transmitter 20, for example, for the transmitter 20 under the jurisdiction of the Japan Coast Guard 29, the distress signal is only in the local area C as shown in Fig. 6. Is set to be sent. Therefore, the distress signal transmission function of the transmitter 20 is set as follows. In other words, the transmitter 20. ? When 5 based position is a region C, the operation sweep rate pitch 2 5 located cormorants good force ⁵ transmitter 2 0 B where I Ri distress signal to the operation (see FIG. 3) is transmitted In the case of outside the area C, the setting is made so that even if the operation switch 25 is operated, the distress signal is not transmitted. In this case, if only the location information and the ID information are set to be constantly transmitted as described above, even if the transmission of the distress signal is prohibited outside the area C, the transmitter 20 is determined from the location information and the ID information. You can check the position of B.

As described above, since the transmitter 20 uses the transmitter of the Argos system, the transmitter and receiver can be reduced in size and weight, and can be easily carried, and can be implemented in various forms as shown in the following embodiments. Can be. FIG. 7 is a diagram showing the first embodiment, in which a transmitter 20 is attached to a telescopic band 40. in this case. The transmitter 20 may be worn on the wrist as shown in FIG. 8A, or may be worn on the arm as shown in FIG. 8B. In an emergency, transmission of the distress signal is started by pressing the operation switch 25 provided on the transmitter 20. FIG. 9 is a view showing a second embodiment of the transmitter according to the present invention, and has a transmitter function and a clock function. . Specifically, the above-mentioned transmitter 20 is built in the wristwatch 41, and transmission of the distress signal starts when the operation switch 25 is pressed in an emergency. Such a wristwatch type can be worn on a daily basis, which is convenient for marine workers and those who enjoy marine leisure, and prevents forgetting to carry a transmitter. Can be. Further, as shown in the third embodiment of FIGS. 10A and 10B, the transmitter 20 may be mounted on the life jacket 42 or the buoyancy adjuster 43 itself for scuba diving. In this case, the transmitter 20 itself enters the water, so attach the telescopic external antenna 44 and extend the antenna 44 so that part of the antenna 44 comes out of the water. In the fourth embodiment shown in FIG. 11, the above-described transmitter 20 is built in the mobile phone terminal 45. In an emergency, the operation switches provided on the mobile phone terminals 45 Transmission of the distress signal is started by operating switches 25. In the case of the mobile phone terminal 45, it is possible to use the mobile phone function to make contact in an emergency, but if the distress location is outside the coverage area of the mobile phone relay station, the mobile phone function can be used Can not. In such a case, distress can be dealt with by operating the operation switch 25 to transmit the distress signal. As a method for preventing erroneous operation of the operation switch 25, a setting is made so that an distress signal is transmitted when the operation switch 25 is pressed twice or more within a predetermined time interval. In this case, in the first operation, the distress signal transmission operation is displayed on the display device 46 to call attention. Then, if there is a second operation, a distress signal is transmitted.

In the above-described embodiment, the case where each individual wears the transmitter 20 which is a PLB has been described. However, as shown in FIG. 12, the transmitter 50 is connected to the transmitter main body 50 a and the transmitter main body 50 a. It may be configured with a remote control unit 5Ob that can turn on the power supply of 50a. Although only one remote control section 50b is shown in FIG. 12, a plurality of remote control sections 50b are provided according to the number of occupants. When this transmitter 50 is used, for example, on a ship, the transmitter main body 50a is installed on the ship, and each occupant carries a remote controller 50b.

When the switch 51 of the remote controller 50b is operated in the event of a distress, a start signal is transmitted from the transmitter 52 to the transmitter body 50a. When this activation signal is received by the receiving section 53 provided in the transmitter main body 50a, the power supply 26 of the transmitter main body 50a is activated. The receiving section 53 may be built in the transmitter main body 50a in advance, or may be configured to be attached later by an attachment type, and the transmitter main body 50a and the remote control section 50a may be attached later. The activation signal can be received even if b is several kilometers away. Reference numeral 54 denotes a power source such as a battery.

The transmitter body 50a is provided with a GPS receiver 21 and a position calculator 23 similar to the transmitter 20 in Fig. 3, and when the power supply 26 is activated, the GPS satellite 22 The position of the transmitter 50 is calculated based on the signal, and the transmitting unit 24 transmits the distress signal of the frequency 406 MHz. The distress signal contains the ID information and the position information of the transmitter 50, and the rescue aircraft and the rescue ship perform rescue activities based on the position information. On the other hand, the remote control unit 50b transmits the above-mentioned distress signal of 121.5 MHz separately from the start signal. Since this 121.5 MHz distress signal can be received at a distance of about 30 Km, rescue aircraft 31 and rescue boat 3 heading for rescue toward a vessel equipped with transmitter 50a 2 will be caught. Therefore, even if the victim carrying the remote control unit 50b is swept away by the ocean current and is far away from the ship, it can be easily found. In addition, since the transmitter 50 is separated into a ship-mounted transmitter body 50a and a portable remote controller 50b, it is easy to increase the capacity of the power supply 26, and Signal transmission can be continued for a longer time. Note that the transmitter 50a may also be provided with an activation switch.

FIG. 13 is a modified example of the transmitter 50 shown in FIG. 12. Each of the remote controllers 50b is also provided with a GPS receiver 21 and a position calculator 23. When the switch 51 of the remote control unit 50 is turned on, the above-described start signal is transmitted, and the position calculation based on the GPS signal is performed at predetermined time intervals. The transmitter 52 transmits the position information and the ID information of the remote controller 50b to the transmitter 50a at predetermined time intervals. Upon receiving the position information and ID information from the remote controller 50b, the transmitter 50a receives the position information and ID of the remote controller 50b together with the position information and ID information of the transmitter 50a. A distress signal (406 MHz) containing information is transmitted to the satellite 27 of the Cospass. The position calculation is performed at predetermined time intervals in order to suppress the consumption of the battery 54. For example, the position calculation is performed at hourly intervals.

By the way, in the example shown in FIG. 13, the position calculation section 23 is provided in each remote control section 50 b, and the position calculation of each remote control section 50 b based on the GPS signal is performed in each remote control section 50 b. The power you made? Alternatively, the remote controller 50b may be configured as shown in FIG. That is, in each remote control unit 50 b, a crystal clock 55 using a crystal oscillator is provided instead of the position calculation unit 23, and the GPS information received from the remote control unit 50 and the reception time by the crystal clock 55 are provided. Transmitted to the transmitter body 50a. The position of each remote controller 50b is calculated by the position calculator 23 of the transmitter body 50a based on the GPS information and the time transmitted from the remote controller 50b. . As a result, the size of the remote control section 50b can be further reduced, and the portability can be further improved. The above-mentioned remote control unit can also be installed in the emergency position indicating radio beacon (EPIRB) for ships and the emergency locator transmitter (ELT) for aircraft.

In the above-described embodiment, the case of salvage rescue has been described as an example. However, the emergency signal transmission / reception transmitter 20 and the early distress detection system of the present invention are not limited to salvage rescue, but also rescue on land, for example, It can also be applied to rescue and rescue at the time, water accidents in rivers such as anglers, and traffic accidents in remote areas where it is difficult to transmit accident information. In addition, the distress signal may be relayed to the ground station by other artificial satellites instead of the satellite of the Cospas-Sasat system. You may use satellites for satellite positioning systems that are operated by.

Claims

The scope of the claims

1.

The emergency signal transmitter is

A receiving unit that receives a position information signal from a satellite for a satellite positioning system; a position calculating unit that calculates a transmitter position based on the position information signal received by the receiving unit;

An distress signal transmission unit that transmits an distress signal including predetermined distress information and transmitter position information calculated by the position calculation unit;

A manual operation unit for instructing transmission of the distress signal.

2.

The emergency signal transmitter is

A receiving unit that receives a position information signal from a satellite for a satellite positioning system, a position calculating unit that calculates a transmitter position based on the signal received by the receiving unit, and a predetermined distress information that is calculated by the position calculating unit A distress signal transmitting unit for transmitting an distress signal including the transmitter position information;

A remote control unit provided separately from the main unit and having a manual operation unit for instructing transmission of the distress signal.

3.

The transmitter for transmitting an emergency signal according to claim 1,

An electronic member including the receiving unit, the position calculating unit, the transmitting unit, and a battery is mounted on a substrate,

An earth wire having one end connected to the substrate,

A foam member enclosing the substrate and the ground wire therein,

A metal conductive layer that covers the periphery of the foam member and is connected to the other end of the ground wire;

An insulating layer covering the metal conductive layer.

Four .

The transmitter for transmitting an emergency signal according to any one of claims 1 to 3, wherein the distress signal includes a transmitter, in addition to the distress information and the transmitter position information. Contains unique ID information.

Five .

The transmitter for transmitting an emergency signal according to any one of claims 1 to 4, wherein the transmitting unit is configured to perform the manual operation when the transmitter position calculated by the position calculation unit is a distress signal transmission permission area. The distress signal is transmitted by the operation of the operation unit, and when the transmitter position is in the distress signal transmission prohibition area, the distress signal is not transmitted even if the manual operation unit is operated.

6.

The transmitter for transmitting an emergency signal according to any one of claims 1 to 5, wherein the distress signal is based on a distress signal rule of a Global Maritime Distress Safety System (GMDSS).

7.

An early distress detection system using the transmitter for transmitting an emergency signal according to any one of claims 1 to 6,

The distress signal transmitted from the transmitter is received on the ground using an artificial satellite, and based on the received distress signal, the position of the emergency signal transmission transmitter and the distress who carries it are specified. An early distress early detection system that reports distress information to the organization to which the distress belongs.