Automatic Identification System (AIS)

From International Dictionary of Marine Aids to Navigation
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A ship and shore-based data broadcast system, operating in the VHF maritime band.

Source: Nick Ward, IALA e-Nav committee vicechair, March 2009

Very High Frequency (30 MHz to 300 MHz)

VHF Communication Service of the CS

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM