Rules of the Road · Restricted Visibility Signals
A sailing vessel underway in restricted visibility sounds which fog signal at intervals not exceeding 2 minutes?
- AOne prolonged blast
- BTwo prolonged blasts
- COne prolonged blast followed by two short blasts✓ Correct
- DTwo short blasts
Explanation
Rule 35(c) groups sailing vessels with NUC, RAM, constrained by draft, fishing, and towing vessels, all sounding one prolonged + two short blasts at intervals not exceeding 2 minutes. Previously (1960 COLREGS), a sailing vessel sounded blasts on different tacks; the 1972 rules standardized this to one signal.
Authority: 72 COLREGS Rule 35(c)
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