Question 1

A vessel is towing astern and the length of the tow, measured from the stern of the towing vessel to the after end of the tow, exceeds 200 metres. Under Annex I/Rule 24, what additional identification is required compared with a shorter tow?

Accepted Answer

A third masthead light in a vertical line (so that the towing vessel shows three masthead lights forward), in addition to the normal towing configuration, plus a diamond shape where the tow is not readily visible Rule 24(a)(i) requires a vessel towing, when the length of the tow exceeds 200 metres, to exhibit three masthead lights in a vertical line forward (instead of the normal two), in addition to sidelights, sternlight, towing light and the normal masthead lights aft. Rule 24(g) and (h) additionally require a diamond shape where the tow's length exceeds 200m and the tow itself is not adequately lit.

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.