WO2004092765A1 - Systeme de surveillance pour batiments de mer - Google Patents
Systeme de surveillance pour batiments de mer Download PDFInfo
- Publication number
- WO2004092765A1 WO2004092765A1 PCT/AU2004/000399 AU2004000399W WO2004092765A1 WO 2004092765 A1 WO2004092765 A1 WO 2004092765A1 AU 2004000399 W AU2004000399 W AU 2004000399W WO 2004092765 A1 WO2004092765 A1 WO 2004092765A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- monitoring system
- data
- monitoring
- line
- fishing
- Prior art date
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 88
- 230000000694 effects Effects 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 4
- 241000251468 Actinopterygii Species 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 16
- 101100219710 Mus musculus Cbarp gene Proteins 0.000 description 7
- 238000013500 data storage Methods 0.000 description 6
- 235000014676 Phragmites communis Nutrition 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 241000282412 Homo Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K91/00—Lines
- A01K91/18—Trotlines, longlines; Accessories therefor, e.g. baiting devices, lifters or setting reelers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J99/00—Subject matter not provided for in other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/0009—Transmission of position information to remote stations
- G01S5/0018—Transmission from mobile station to base station
- G01S5/0027—Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/14—Fishing vessels
Definitions
- the present invention relates to monitoring of activities aboard marine vessels.
- the present invention provides a monitoring system for marine vessels including: a data processor arranged to be located on a marine vessel and having at least one data input for receiving data from at least one input device, the data relating to activities on board the vessel whereby a record of the activities can be obtained.
- the monitoring system may further include a transmitter arranged to be located on the vessel and to be operatively connected to the data processor, whereby the data relating to activities of the vessel may be transmitted to be received at a remote location.
- the at least one input device may include a camera.
- the camera may be a video camera.
- the at least one input device may include a microphone.
- the at least one input device may include a hydraulic pressure sensor.
- the at least one input device may include a drum monitor.
- the at least one input device may include a sensor to determine the rate of flow of water from a bilge pump.
- the at least one input device may include a water oil content monitor.
- the at least one input device may include a tackle monitoring means which is means is configured to- sense an event signifying attachment of a fishing tackle item to a fishing line.
- fishing tackle items include hooks, clips, floats or buoys.
- the event may include an audible indication that items should be attached to a fishing line or alternatively or in addition a visual indication and/or electrical, analog or digital transmissions.
- the tackle monitoring means includes an electrical sensor for sensing an electrical signal corresponding to the audible indication.
- the audible indication may be an audible noise of a predetermined configuration or type such as a beep, barp, or beep barp etc .
- the audible indicator emits different audible noises to signify that different items of fishing tackle need to be attached to a fishing line.
- the audible noises may be emitted by a line controller device.
- the tackle monitoring means may be connected to the line controller device.
- the tackle monitoring means is configured to sense a current/voltage of a predetermined amplitude/frequency or period occurring in the line controller, which is utilised to generate the audible indication.
- the tackle monitoring means is adapted to sense a predetermined current/voltage corresponding to different audible sounds representing the attachment of different items to the fishing line.
- the system includes a line monitoring means for monitoring at least one characteristic of a fishing line.
- the line monitoring means preferably includes at least one line monitor.
- the system may include a plurality of line monitors each for monitoring a different fishing line.
- each fishing line is wound onto a drum.
- the line monitoring means may be connected to the data processor so as to transmit a line signal to the data processor which line signal represents a monitored/sensed characteristic of a fishing line.
- the line monitoring means preferably detects the number of revolutions of a fishing line drum.
- the data processor is adapted to calculate the length of a line which has been deployed based on data received from the line monitoring means.
- the data processor may be adapted to receive data from the line monitoring means relating to the rate of release of line and/or number of drums used and/or the/each drum direction.
- the tackle monitoring means detects any one or more of : number of clips counted on any drum; number of hooks attached to a line; number floats attached to a line; number of buoys attached to a line; and line spacing of any one or more of the above.
- the camera may be positioned to capture images of any one or more of the or each fishing line, fishing drum, deployment of fishing line, fish caught.
- the at least one input device may include a location monitoring means for monitoring the location of the vessel at a particular time.
- the location monitoring means may be adapted to send data to the data processor relating to the location ' of any line deployed from the fishing vessel and/or the time of deployment and/or the location and/or time of deployment of any fishing tackle items.
- the location monitoring means may include a GPS system or VMS.
- the transmitter may be arranged to periodically transmit the data relating to activities.
- the data processor is preferably adapted to calculate hook counts, float counts, buoy counts, line spacing, time and date stamping when a drum is retrieving or- releasing fishing line, when it is started, stopped and location of any one or more of the above events .
- the data is transmitted to the base station at a predetermined time.
- the predetermined time may be stored in the central processor or a central controller at the base station.
- the data may be transmitted to the base station following a command signal transmitted to the central processor from the base station.
- the data processor may have a storage means for storing data over a predetermined period of time.
- the storage means may be located remote from the data processor.
- the system includes an anti- tamper means for producing an alarm signal if there is unauthorised entry of an enclosure housing the central processor.
- the anti-tamper means may produce an alarm signal if the storage means is tampered with.
- the anti-tamper means is configured to transmit the alarm signal to the base station.
- the anti-tamper means is adapted to identify the time and location of the tampering event, log this information and either store the information in the storage means or transmit the information.
- the anti-tamper means preferably produces an alarm signal if data is corrupted.
- the sensed data may be encrypted by the data processor.
- the remote location may store a decryption code for decrypting sensed data encrypted and transmitted from the data processor.
- the encrypted data may be stored in the storage means .
- the data processor tags data with an identifier associated with the vessel on which the central processor is located.
- the system may further include a receiver for receiving command signals from a remote location.
- command signals may be used to control operation of any of the sensors by appropriate command signals.
- Figure 1 is a schematic diagram of a first embodiment of a system for monitoring activities on a marine vessel in the case of a fishing vessel and fishing activities are monitored;
- Figure 2 is a schematic diagram of a system for monitoring activities on a marine vessel according to another embodiment of the present invention.
- the monitoring system includes a data processor in the form of programmable logic controller 10 (PLC) which is located on a marine vessel and includes data inputs for receiving data from input devices 11, 12, 13.
- PLC programmable logic controller
- the input devices sense data relating to activities on board the vessel and this data is provided to PLC 10 whereby a record of the activities can be obtained.
- Input devices are shown including. a tackle monitoring means in the form of line controller sensors 11 and line monitoring means in the form of reed switches 12. Both of these devices are hardwired to PLC 10.
- a video surveillance system 14 incorporating video cameras is linked to the PLC 10 through a wireless communication system.
- PLC 10 is used to receive all data and .processes it so that it may be recorded on the vessel or transmitted off the vessel to a remote location for storage or viewing.
- PLC 10 is configured so that it can receive inputs from each of the above-identified components even though the components may transmit data in different formats or based on different signal types.
- a line controller is a device that alerts a fisherman on board a vessel of the correct time during letting out a long line to attach various items of tackle to the line. These long lines can reach many kilometres in length. As a long line is let out from the vessel, clips, hooks, floats and buoys are attached at controlled intervals. The line controller signals to the fisherman to attach an item of tackle by making various audible sounds . Different sounds correspond to different items of tackle. So, a "barp" sound 'might indicate the need to attach a float. A "beep barp" sound might indicate the need to attach a buoy.
- Line controller sensors 11 monitor changes in voltage levels within the line controller at the output stage of the line controller.
- the sensors may pick up changes in voltage levels, the length of any output pulse by the line controller as well as the frequency of any output voltage or current .
- the sensed voltage, and/or current is indicative of the signal output by the line controller to activate an audible alarm. Therefore, if the line controller produces a beep sound, this may be characterised by an output voltage of a predetermined level and period and so it can be monitored and converted at the PLC to signify a beep and therefore the time when a hook should be connected to a fishing line. Consequently every time a beep is detected by the PLC an accumulator in the PLC stores data relating to the number of beeps and therefore the number of hooks which should have been attached to the line each time the beep occurred.
- the PLC has separate accumulators for each type of sound which is detected (in the form of a voltage output) and an accumulated count of each type of sound can be stored in the PLC. If a "barp" is sounded by the line controller the PLC will record a voltage signal received representing the occurrence of the "barp" , which corresponds to the attachment of a float to the fishing line. Likewise, the recordal of voltage output corresponding to a "beep barp" signal would be recorded by the PLC to represent the attachment of a buoy to a fishing line.
- the PLC matches the location information received from the location monitoring unit 13 and stores this with the time the voltage output signal was sensed in the line controller. From the above it can be seen that over a period of time a log can be provided of the occurrence of every voltage output signal from the line controller in addition to the associated time and location of the vessel .
- the PLC is connected to reed switches 12 of the fishing line drums. The reed switches 12 are opened and closed at predetermined times corresponding to each revolution of the drum and/or each time the drum is operated (forward or in reverse) .
- This data may be recorded as a simple on/off signal which again is stored in the PLC along with time and location data retrieved from the location monitoring unit 13.
- other sensors could be used such as mercury switches, magnetic proximity sensors or optical sensors. The important thing is that the rotation of the drum is sensed.
- video cameras 14 are also mounted somewhere on the fishing vessel to monitor the line controller and fishing line drums. Data is continuously captured by the cameras and transmitted to the PLC 10. The transmission may be through wireless communication or through cabling. Data received from the cameras is also associated with timing and location information in a similar fashion to the other data received from the line controller sensors 11 and reed switches 12. In this way video images captured at a particular time and location can be compared to the data received from the other sensors . This provides a backup capability or checking facility in case other data received is corrupted in some fashion.
- the PLC 10 is specially configured to be able to receive data inputs as well the electrical analog and digital inputs from the other sensors.
- the PLC 10 may store all of the data in an appropriate memory location and medium such as a computer hard drive or the information may be continuously downloaded in information packets to a remote receiving station which could be onshore.
- the PLC can be remotely controlled so that movement of the cameras 14 can also be controlled.
- the cameras be black and white units that will send all data via a wireless LAN back to the PLC for storage. Transmissions may be at one frame per second to reduce storage requirements .
- the monitoring system includes a data processor in the form of process controller 20 preferably with a back-up internal battery supply if external power supply is unavailable.
- Process controller 20 has a number of direct analog and digital inputs and outputs. Video inputs are connected to day- night cameras 21 and discreet cameras 22. Digital inputs are connected to drum counters 23 and line shooters 24.
- Process controller 20 includes a microprocessor and operates under the control of a computer program.
- Analog inputs are connected to temperature and turbidity sensors 25. Inputs are also connected to click counters 26 and to a GPS navigation device 27. Hydraulic pressure sensors 35 and other mechanical equipment such as water oil content meter 36 in the bilge or bilge pump flow rate sensor 37 on board the vessel are connected to other inputs of the process controller 20.
- the process controller 20 is connected to an onboard data storage device 29. Both the process controller 20 and data storage device 20 are connected to a transceiver 34 preferably mounted on the vessel mast.
- Transceiver 34 is able to communicate via satellite 30 or wireless LAN or GPRS 31. All remote communications are directed to a base station 32 through integration software 33 associated with a land based transmitter/receiver.
- the process controller 20 receives all data from the sensors 21 to 28, 35, 36 & 37. The time and place of the data is logged and stored on the onboard data storage device 29.
- stored data may be transmitted to the base station or alternatively the base station may periodically or randomly retrieve the data from the process controller or data storage unit by appropriate command signals transmitted through the communication network to the process controller 20 or data storage unit 29.
- the base station is equipped with decryption software which enables all the data to be decrypted and reviewed as required.
- data may be stored by the data storage unit for retrieval when the fishing vessel returns to port.
- data may be stored in a suitable memory device and can be removed and taken to the base station for processing.
- a fleet of vessels may be provided with similar onboard monitoring devices.
- One of the vessels may be designated the main vessel and may be provided with satellite or wireless LAN communication abilities so that data can be gathered by that vessel from other vessels and can be transmitted to the base station on request if desired.
- MARPOL regulations stipulate maximum petroleum levels in discharged bilge water and the monitoring system may be used to monitor compliance of a vessel with MARPOL regulations.
- Process controller may be arranged to monitor the data obtained from water oil content meter 36 that is positioned at an outlet of the vessel through which bilge water is discharged. The monitoring system can thus determine if bilge water is discharged which contains a level of petroleum that breaches regulations.
- a breach of the regulations may cause data to be sent to the base station to alert of the breach and identify the vessel and location and time that the breach occurred.
- Marine species are carried around the world in the ballast water of seagoing vessels. When discharged into new environments, they may become invasive and severely disrupt the native ecology, impact economic activities such as - fisheries and cause disease and even death in humans. Regulations are in place to limit the impact of carriage of marine species in ballast. Particularly, a vessel on an international voyage is required to flush the contents of its ballast tanks three times in between international destinations. The flushing must be carried out at least 200 nautical miles off the coast
- process controller 20 may be arranged to monitor data from bilge pump flow rate sensor 37 and GPS receiver. Process controller 20 can thereby detect whether bilge flushing is carried out at least 200 nautical miles off shore, and whether a sufficient bilge flushing is carried out before the destination is reached.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Chemical & Material Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Combustion & Propulsion (AREA)
- Alarm Systems (AREA)
Abstract
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003901904A AU2003901904A0 (en) | 2003-04-17 | 2003-04-17 | A monitoring system for fishing vessels |
| AU2003901904 | 2003-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004092765A1 true WO2004092765A1 (fr) | 2004-10-28 |
Family
ID=31500941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU2004/000399 WO2004092765A1 (fr) | 2003-04-17 | 2004-03-29 | Systeme de surveillance pour batiments de mer |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2003901904A0 (fr) |
| WO (1) | WO2004092765A1 (fr) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2324930A1 (es) * | 2008-02-18 | 2009-08-19 | Cristobal Ginard Acosta | Sistema de control de la actividad pesquera para embarcaciones de pesca de arrastre. |
| US7821393B2 (en) | 2008-02-01 | 2010-10-26 | Balmart Sistemas Electronicos Y De Comunicaciones S.L. | Multivariate environmental sensing system with intelligent storage and redundant transmission pathways |
| CN102874398A (zh) * | 2012-10-16 | 2013-01-16 | 河海大学 | 一种船舶智能预警和制动安全系统 |
| ES2401009R1 (es) * | 2011-08-08 | 2013-05-10 | Zunibal S L | Sistema de gestion integrado de herramientas de medicion, comunicacion y representacion de datos referidos a pesca con objeto |
| WO2014193221A1 (fr) * | 2013-05-29 | 2014-12-04 | Folkers Willem | Procédé et système permettant de récupérer des données de localisation d'un objet au cours du temps au moyen d'un récepteur gnss à des fins d'anti-mystification, et récepteur et lecteur de signaux dans l'espace pour ce procédé et ce système |
| US11603173B2 (en) | 2019-02-12 | 2023-03-14 | Nauti-Tech Inc. | Devices, systems and methods for monitoring, recording and communication of vessel information |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2753588A1 (fr) * | 1996-09-19 | 1998-03-20 | Perri Christian | Procede et dispositif de telesurveillance d'un habitacle mobile |
| EP0921411A2 (fr) * | 1997-12-05 | 1999-06-09 | Hino Jidosha Kogyo Kabushiki Kaisha | Système de surveillance pour bateaux |
| NL1008074C1 (nl) * | 1998-01-20 | 1999-07-21 | Aart Bezemer | Bewakings- en beveiligingssysteem voor verplaatsbare objecten. |
| US6057759A (en) * | 1996-10-22 | 2000-05-02 | Marsh; Matthew T. | Marine personnel monitoring, overboard detection, alert and rescue system |
| US6057879A (en) * | 1996-03-11 | 2000-05-02 | Weber; Eric D. | Fishing surveillance device |
| WO2000052611A2 (fr) * | 1999-03-02 | 2000-09-08 | Arnold Richard C | Procede de collecte de donnees pour la gestion de pecheries |
| US6222449B1 (en) * | 1997-07-21 | 2001-04-24 | Ronald F. Twining | Remote fish logging unit |
| US6249241B1 (en) * | 1995-09-21 | 2001-06-19 | The United States Of America As Represented By The Secretary Of The Navy | Marine vessel traffic system |
| US20010029613A1 (en) * | 1998-03-19 | 2001-10-11 | Fernandez Dennis Sunga | Integrated network for monitoring remote objects |
| WO2002077937A2 (fr) * | 2001-02-28 | 2002-10-03 | Beacon Marine Security Limited | Systeme et procede de surveillance de navire |
| US6520105B2 (en) * | 1999-01-29 | 2003-02-18 | Coden Co., Ltd. | Remote control unmanned fishing boat and device for remote control thereof |
-
2003
- 2003-04-17 AU AU2003901904A patent/AU2003901904A0/en not_active Abandoned
-
2004
- 2004-03-29 WO PCT/AU2004/000399 patent/WO2004092765A1/fr active Application Filing
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6249241B1 (en) * | 1995-09-21 | 2001-06-19 | The United States Of America As Represented By The Secretary Of The Navy | Marine vessel traffic system |
| US6057879A (en) * | 1996-03-11 | 2000-05-02 | Weber; Eric D. | Fishing surveillance device |
| FR2753588A1 (fr) * | 1996-09-19 | 1998-03-20 | Perri Christian | Procede et dispositif de telesurveillance d'un habitacle mobile |
| US6057759A (en) * | 1996-10-22 | 2000-05-02 | Marsh; Matthew T. | Marine personnel monitoring, overboard detection, alert and rescue system |
| US6222449B1 (en) * | 1997-07-21 | 2001-04-24 | Ronald F. Twining | Remote fish logging unit |
| EP0921411A2 (fr) * | 1997-12-05 | 1999-06-09 | Hino Jidosha Kogyo Kabushiki Kaisha | Système de surveillance pour bateaux |
| NL1008074C1 (nl) * | 1998-01-20 | 1999-07-21 | Aart Bezemer | Bewakings- en beveiligingssysteem voor verplaatsbare objecten. |
| US20010029613A1 (en) * | 1998-03-19 | 2001-10-11 | Fernandez Dennis Sunga | Integrated network for monitoring remote objects |
| US6520105B2 (en) * | 1999-01-29 | 2003-02-18 | Coden Co., Ltd. | Remote control unmanned fishing boat and device for remote control thereof |
| WO2000052611A2 (fr) * | 1999-03-02 | 2000-09-08 | Arnold Richard C | Procede de collecte de donnees pour la gestion de pecheries |
| WO2002077937A2 (fr) * | 2001-02-28 | 2002-10-03 | Beacon Marine Security Limited | Systeme et procede de surveillance de navire |
Non-Patent Citations (2)
| Title |
|---|
| DATABASE WPI Derwent World Patents Index; Class W05, AN 1999-549760 * |
| DATABASE WPI Derwent World Patents Index; Class X22, AN 1998-195964 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7821393B2 (en) | 2008-02-01 | 2010-10-26 | Balmart Sistemas Electronicos Y De Comunicaciones S.L. | Multivariate environmental sensing system with intelligent storage and redundant transmission pathways |
| ES2324930A1 (es) * | 2008-02-18 | 2009-08-19 | Cristobal Ginard Acosta | Sistema de control de la actividad pesquera para embarcaciones de pesca de arrastre. |
| ES2324930B1 (es) * | 2008-02-18 | 2010-05-24 | Cristobal Ginard Acosta | Sistema de control de la actividad pesquera para embarcaciones de pesca de arrastre. |
| ES2401009R1 (es) * | 2011-08-08 | 2013-05-10 | Zunibal S L | Sistema de gestion integrado de herramientas de medicion, comunicacion y representacion de datos referidos a pesca con objeto |
| CN102874398A (zh) * | 2012-10-16 | 2013-01-16 | 河海大学 | 一种船舶智能预警和制动安全系统 |
| WO2014193221A1 (fr) * | 2013-05-29 | 2014-12-04 | Folkers Willem | Procédé et système permettant de récupérer des données de localisation d'un objet au cours du temps au moyen d'un récepteur gnss à des fins d'anti-mystification, et récepteur et lecteur de signaux dans l'espace pour ce procédé et ce système |
| NL2013831A (en) * | 2013-05-29 | 2015-01-13 | Willem Folkers | Method for reducing a risk of tampering and/or spoofing of location data of an object over time. |
| US11603173B2 (en) | 2019-02-12 | 2023-03-14 | Nauti-Tech Inc. | Devices, systems and methods for monitoring, recording and communication of vessel information |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003901904A0 (en) | 2003-05-08 |
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