Rules of the Road · Restricted Visibility Signals
A vessel constrained by her draft is underway in restricted visibility. What fog signal does she sound?
- AOne prolonged blast every 2 minutes
- BTwo prolonged blasts every 2 minutes
- COne prolonged blast followed by two short blasts every 2 minutes✓ Correct
- DOne prolonged blast followed by three short blasts every 2 minutes
Explanation
Rule 35(c) includes vessels constrained by their draft in the group that sounds one prolonged blast followed by two short blasts at intervals not exceeding 2 minutes. Although constrained-by-draft is a power-driven vessel, her special status in Rule 18 is reflected by the Rule 35(c) signal rather than the simple one-prolonged-blast of Rule 35(a).
Authority: 72 COLREGS Rule 35(c)
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