Question 852Rules of the Road90% to pass
BOTH INTERNATIONAL & INLAND When is a power-driven vessel "not under command" at night required to show her sidelights?
AI Explanation
The correct answer is A) when making headway.
According to the International Regulations for Preventing Collisions at Sea (COLREGS), a power-driven vessel that is "not under command" at night is required to show her sidelights when making headway. This means that even if the vessel is not under command, if it is still moving through the water, it must display its sidelights to indicate its presence and direction of travel to other vessels.
The other options are incorrect because: B) a vessel moored to a buoy is considered at anchor, not "not under command"; C) a vessel making no headway would typically be considered at anchor and display anchor lights instead; and D) a vessel at anchor is not required to show sidelights, only anchor lights.
Related Questions
#850 BOTH INTERNATIONAL & INLAND Which lights is a vessel not under command, underway but not making way, required to exhibit? #851 BOTH INTERNATIONAL & INLAND A vessel which is unable to maneuver due to some exceptional circumstance, shall show two red lights in a vertical line and which additional lights or shapes?#853 BOTH INTERNATIONAL & INLAND Two all-round red lights displayed in a vertical line are shown by which vessel? #854 BOTH INTERNATIONAL & INLAND Which of the following describes a vessel exhibiting the lights shown in illustration D083RR below? #855 BOTH INTERNATIONAL & INLAND Which lights is a vessel not under command making way at night is required to show?