USCG Exam Practice · Rule 32 — Sound Signal Definitions
Under the Inland Navigation Rules, a sailing vessel is underway in restricted visibility. Which sound signal must she make?
- AOne prolonged blast at intervals of not more than 2 minutes
- BTwo prolonged blasts at intervals of not more than 2 minutes
- COne prolonged followed by two short blasts at intervals of not more than 2 minutes✓ correct
- DFour short blasts at intervals of not more than 2 minutes
Why C is correct
33 CFR §83.35(c) groups sailing vessels with vessels not under command, vessels restricted in ability to maneuver, vessels engaged in fishing, and towing/pushing vessels — all of which sound one prolonged followed by two short blasts at intervals of not more than 2 minutes. The one-prolonged-blast signal applies only to a power-driven vessel making way per §83.35(a).
Cited:33 CFR §83.35
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