Under Rule 33, a vessel longer than 12 meters but not more than 20 meters must sound with which signal?

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Multiple Choice

Under Rule 33, a vessel longer than 12 meters but not more than 20 meters must sound with which signal?

Explanation:
Signals you must use depend on how long the vessel is. For a vessel between 12 and 20 meters, the rule requires a whistle as the sound-producing device. A bell (and gong) are reserved for larger vessels, specifically those 20 meters or more in length. So the needed signal for this size range is just a whistle—no bell is required here. Bells would be used on larger ships to supplement signals, but they aren’t mandated for this length category, and a bell alone wouldn’t satisfy the requirement.

Signals you must use depend on how long the vessel is. For a vessel between 12 and 20 meters, the rule requires a whistle as the sound-producing device. A bell (and gong) are reserved for larger vessels, specifically those 20 meters or more in length. So the needed signal for this size range is just a whistle—no bell is required here. Bells would be used on larger ships to supplement signals, but they aren’t mandated for this length category, and a bell alone wouldn’t satisfy the requirement.

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