BOTH INTERNATIONAL & INLAND In restricted visibility, which signal shall a vessel fishing with nets sound at intervals of two minutes?

Correct Answer: Option B — One prolonged followed by two short blasts

COLREGS Rule 35(c) requires a vessel engaged in fishing, when restricted in her ability to maneuver, to sound one prolonged followed by two short blasts at intervals of not more than two minutes. This signal identifies the vessel's status to others navigating in restricted visibility.