Digital Selective Calling
NOTE:
Before you can use Digital Selective Calling, you must program the radio with an MMSI
number (Programming the Radio Using the ActiveCaptain App).
Digital Selective Calling (DSC) is a method of exchanging information and requesting to communicate with other vessels by voice.
Channel 70 is reserved exclusively for DC. The Garmin Signal™ VHF radio uses a dedicated receiver to monitor it.
When placing a non-distress DSC call, you must select a follow-up channel for voice communication. Vessels accepting your call automatically tune their receivers to the follow-up channel.
You should familiarize yourself with DSC call categories and standards (DSC Call Categories).
NOTE:
Digital Selective Calling is not available when ATIS is turned on. All VHF transmissions
are automatically identified when ATIS is on.