Rules of the Road · Distress Signals
The DSC (Digital Selective Calling) distress alert on VHF Channel 70 is a recognized distress signal under which Annex IV provision?
- AAnnex IV, paragraph 1(g)
- BAnnex IV, paragraph 1(n)
- CAnnex IV, paragraph 1(o)✓ Correct
- DAnnex IV, paragraph 1(d)
Explanation
Annex IV paragraph 1(o), added by amendment, covers 'distress alerts sent via GMDSS equipment including DSC on VHF, MF/HF, and satellite.' DSC on Channel 70 sends a digital distress alert automatically to nearby vessels and coast stations equipped with GMDSS receivers. This modernized the original Annex IV signal list to incorporate GMDSS technology.
Authority: 72 COLREGS Annex IV, paragraph 1(o)
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