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USCG Warns Mariners Against Disabling AIS

The USCG has issued a warning to mariners to not disable their vessel's Automated Identification System (AIS) due to the potential for danger and the legal consequences they could face.

As US Coast Guard Sector Columbia River boarding team supervisor Lt. Collin Gruin states, "AIS is a vital tool in a host of Coast Guard missions including search and rescue and port security. It's not only illegal to turn it off but also incredibly dangerous."

AIS is a maritime navigation safety communications system that automatically transmits vessel information to shore stations, other ships, and aircraft. Vessel identity, type, position, course, speed, navigational status, and safety-related information are included in the transmissions. The communications system also automatically receives such information from similarly fitted ships; monitors and tracks ships; and exchanges data with shore-based facilities.

According to 33 CFR 164.46, all self-propelled vessels, at a length of 65 feet or more, engaged in commercial service and operating on the territorial seas (within 12-nautical miles of shore) must maintain AIS in effective operating condition, which includes the continual operation of AIS and its associated devices (e.g., positioning system, gyro, converters, displays) at all times while the vessel is underway or at anchor, and, if moored, at least 15 minutes prior to getting underway.

It is important to note that accurate input and upkeep of all AIS data fields are required for effective AIS operation. Mariners violating this regulation may face civil penalties of up to $35,486 per violation.


Since 1935, MOPS has protected the licenses and livelihoods of more than 80,000 deck and engineering officers, state and federal pilots and certified tankermen.  

We cover USCG licensed officers operating aboard vessels of any size in every sector of the maritime industry.  If you want a quote, give us a ring at 800-782-8902, ext. 3608 or 3302.  Or fill out our online form and we'll email you a quote.