Question 1

Rule 31 notes that seaplanes (and similarly, WIG craft in some interpretations) may be unable to comply exactly with the lighting/shape rules for other vessels. What is the general approach taken by the Rules in such cases?

Accepted Answer

Where a seaplane cannot comply with the provisions of the Rules concerning lights, shapes or sound signals, due to the constructional limitations of such a craft, she shall comply as closely as possible — recognising practical limitations while keeping the underlying intent (visibility/signalling to other traffic) as far as achievable Rule 31 acknowledges that craft with unusual configurations (seaplanes, and by extension other unconventional craft) may not be able to carry standard lights/shapes exactly as specified, requiring compliance "as closely as possible in character and position" rather than exemption.

Question 2

Rule 5 (Look-out) requires every vessel at all times to maintain a proper look-out by sight and hearing, as well as by all available means appropriate in the prevailing circumstances and conditions — and this duty applies even when the vessel is at anchor in a busy anchorage.

Accepted Answer

True True. Rule 5 applies 'at all times' and to 'every vessel'. A vessel at anchor in a busy anchorage still needs an effective look-out to detect drifting vessels, dragging anchors, or approaching traffic that may pose a risk of collision or contact.

Question 3

Under Rule 6 (Safe Speed), a vessel fitted with a fully operational radar and ARPA never needs to reduce speed in restricted visibility, because the equipment guarantees early detection of other vessels.

Accepted Answer

False False. Rule 6 explicitly lists radar capability as one factor to consider, but also requires accounting for the state of visibility, traffic density, manoeuvrability, and the limitations of radar (range scale, sea/rain clutter, blind sectors). Even a vessel with excellent radar must proceed at a speed that allows proper and effective action to avoid collision and to be stopped within a distance appropriate to the prevailing circumstances.