Question 1

Vessel A is overtaking Vessel B on a similar heading. As A draws level and then ahead, the vessels' relative bearings change such that the situation would now look like a crossing situation if assessed fresh. Under Rule 13(d), what governs the obligations of A and B?

Accepted Answer

Any conclusion arrived at as an overtaking situation shall remain such until the vessel is finally past and clear, even though the relative bearing changes — Vessel A (the overtaking vessel) remains obliged to keep clear of Vessel B Rule 13(d) exists precisely to prevent an overtaking vessel from "becoming" a stand-on vessel under Rule 15 simply because the geometry changed during overtaking — the overtaking obligation persists until finally past and clear.

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.