Vessel Tracking Technology Archives - Global Fishing Watch Publicly sharing knowledge about human activity at sea Tue, 15 Oct 2024 09:52:49 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.3 https://globalfishingwatch.org/wp-content/uploads/cropped-gfwisologo512x512-1-1-32x32.png Vessel Tracking Technology Archives - Global Fishing Watch 32 32 What is AIS? https://globalfishingwatch.org/faqs/what-is-ais/ Wed, 10 Apr 2019 09:22:15 +0000 http://globalfishingwatch.stage.pixeledeggs.com/?post_type=ht_kb&p=7321 The automatic identification system, or AIS, transmits a ship’s position so that other ships are aware of its position. The International Maritime Organization and other management bodies require large ships, including many commercial fishing vessels, to broadcast their position with AIS in order to avoid collisions. Each year, more than 400,000 AIS devices broadcast vessel […]

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]]> What is VMS? https://globalfishingwatch.org/faqs/what-is-vms/ Mon, 29 Apr 2019 08:14:09 +0000 http://globalfishingwatch.stage.pixeledeggs.com/?post_type=ht_kb&p=7415 Vessel monitoring system, or VMS, tracks vessels in a similar way to AIS, but has historically been restricted to government regulators or other fisheries authorities. Several countries have released their VMS publicly on the Global Fishing Watch map. VMS systems broadcast positions at set intervals and some systems allow operators to increase transmission frequency when […]

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]]> What is VIIRS? https://globalfishingwatch.org/faqs/what-is-viirs/ Mon, 29 Apr 2019 08:16:31 +0000 http://globalfishingwatch.stage.pixeledeggs.com/?post_type=ht_kb&p=7419 The visible infrared imaging radiometer suite, or VIIRS, is a satellite-based highly sensitive optical sensor to see lights at day and night. The sensor is highly sensitive so that it can detect light emitted by vessels on the ocean at night. The Earth Observation Group (EOG) at the Colorado School of Mines has developed an […]

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]]> What vessels are required to use AIS? What are global regulations and requirements for vessels to carry AIS? https://globalfishingwatch.org/faqs/what-vessels-are-required-to-use-ais-what-are-global-regulations-and-requirements-for-vessels-to-carry-ais/ Mon, 29 Apr 2019 08:17:59 +0000 http://globalfishingwatch.stage.pixeledeggs.com/?post_type=ht_kb&p=7421 The IMO requires AIS use by all vessels >500GT, for any vessel >300GT that is on an “international voyage” and for all passenger vessels: IMO Revised Guidelines for the Onboard Operation Use of Shipborne AIS – A.1106(29) 22 AIS should always be in operation when ships are underway or at anchor. If the master believes […]

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]]> Can fishing vessels turn off their AIS? https://globalfishingwatch.org/faqs/can-fishing-vessels-turn-off-their-ais/ Fri, 10 May 2019 10:04:49 +0000 http://globalfishingwatch.stage.pixeledeggs.com/?post_type=ht_kb&p=7451 Fishing vessels can turn off their AIS – and Global Fishing Watch can help detect when this appears to occur. We can also flag instances where ships disappear or appear suddenly, jump thousands of miles at once, or appear to fish on land. AIS was primarily designed as a safety mechanism to help avoid collisions […]

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