GMDSS Frequencies and Radio Bands Flashcards
6 cards from real GMDSS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 GMDSS Frequencies and Radio Bands flashcards as text
What is the international VHF distress, safety, and calling frequency used in GMDSS?
Answer: Channel 16 (156.8 MHz)
Channel 16 at 156.8 MHz is the designated international VHF distress, safety, and calling frequency maintained by all GMDSS-equipped vessels.
Which frequency is designated for Digital Selective Calling (DSC) on VHF?
Answer: 156.525 MHz (Ch 70)
VHF Channel 70 at 156.525 MHz is the dedicated DSC frequency used for automated digital distress and safety alerting.
What is the MF distress and calling frequency used for voice (radiotelephone) in GMDSS?
Answer: 2182 kHz
2182 kHz is the international MF radiotelephone distress and calling frequency used for voice communications in GMDSS.
Which MF frequency is used for DSC distress alerting?
Answer: 2187.5 kHz
2187.5 kHz is the international MF DSC frequency used to transmit digital selective calling distress alerts.
What frequency is used for Navtex broadcasts in the US and Western Atlantic?
Answer: 518 kHz
518 kHz is the primary international Navtex frequency used for maritime safety information broadcasts in English.
Which HF frequency band is commonly used for long-range GMDSS DSC distress alerting?
Answer: 4 MHz band (4207.5 kHz)
The 4 MHz HF band, specifically 4207.5 kHz, is one of the designated HF DSC distress frequencies for long-range communications.
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