United States Coast Guard Captains License Practice Exam

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What is recognized as a distress signal?

  1. A black ball shape

  2. The international code signal of distress indicated by "NB."

  3. A green smoke signal

  4. Flames on the vessel as from a burning oil or tar barrel

The correct answer is: Flames on the vessel as from a burning oil or tar barrel

Flames on the vessel, as described in the context of a burning oil or tar barrel, are recognized as a distress signal because fire typically signifies an emergency situation that is likely to draw attention. The sight of flames can be seen from a considerable distance and serves as a universal indicator that a vessel is in trouble. This makes it an effective means of signaling for help, alerting nearby vessels or shore patrols to a vessel’s critical condition. In maritime operations, the visual impact of flames indicates urgency and the need for immediate assistance. Other options, while they may imply signal usage, do not hold the same universally recognized status for distress. For example, a black ball shape is often used in navigation and signaling, but it does not communicate distress. The international code signal of distress "NB" is not widely known, and while green smoke can be used for signaling, it is not a standard distress signal.

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