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What is VMS?

What is VMS?

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 needed. Some vessels broadcast both AIS and VMS so information from both systems can be combined to give a higher resolution vessel track.

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