What is AIS Transceiver?
An AIS transceiver is a system that automatically broadcasts your vessel's position, course, speed, and identification while simultaneously receiving the same information from other AIS-equipped vessels.
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What it is
An AIS transceiver is a system that automatically broadcasts your vessel's position, course, speed, and identification while simultaneously receiving the same information from other AIS-equipped vessels.
What it does
The AIS transceiver continuously broadcasts your vessel's GPS position, COG (course over ground), SOG (speed over ground), vessel name and other identification data. Simultaneously, it receives broadcasts from all other AIS-equipped vessels within range and displays them as targets on your chartplotter or dedicated AIS display. You can see vessel names, closest point of approach (CPA), time to CPA, and other critical information for collision avoidance. The system works regardless of visibility conditions and provides far more information than radar alone.
Why it matters
AIS dramatically improves collision avoidance by showing you vessels beyond visual and radar range with precise identity and vector information. Commercial vessels, ferries, and many recreational boats rely on AIS. If your system fails, they can't see you electronically, which can heighten collision risk especially in shipping lanes or fog.
General Maintenance
Test AIS transmission regularly by checking if your vessel appears on nearby boats' AIS displays or use online AIS tracking websites to verify you're transmitting. Monitor your system’s range, you should see AIS targets 15-30+ miles away depending on antenna height. Perform annual inspection of AIS antenna and connector. While maintenance schedules can vary between AIS units from different manufacturers, SOLAS requires annual testing of AIS systems on commercial vessels. Commercial standards tend to be higher, and can provide a useful benchmark for recreational boaters to adopt.
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