In restricted visibility, which two vessel types sound the same signal when underway or at anchor?

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Multiple Choice

In restricted visibility, which two vessel types sound the same signal when underway or at anchor?

Explanation:
In restricted visibility, sound signals convey what a vessel is doing or its maneuvering ability. A fishing vessel that is underway or at anchor uses one prolonged blast followed by two short blasts. A RAM vessel (restricted in its ability to maneuver) uses the same signal pattern when underway or at anchor. So, hearing one prolonged and two short blasts indicates either a fishing vessel or a RAM vessel, and other vessels should exercise caution and take appropriate action to avoid collision. The other pairings do not share this same signal pattern, so they don’t fit as the two vessel types that sound the same.

In restricted visibility, sound signals convey what a vessel is doing or its maneuvering ability. A fishing vessel that is underway or at anchor uses one prolonged blast followed by two short blasts. A RAM vessel (restricted in its ability to maneuver) uses the same signal pattern when underway or at anchor. So, hearing one prolonged and two short blasts indicates either a fishing vessel or a RAM vessel, and other vessels should exercise caution and take appropriate action to avoid collision. The other pairings do not share this same signal pattern, so they don’t fit as the two vessel types that sound the same.

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