Question 1

In a crossing situation under Rule 15, the give-way vessel is required to avoid crossing ahead of the other vessel where circumstances allow. What action best fulfils this requirement?

Accepted Answer

An early and substantial alteration of course and/or speed, made in good time, large enough to be readily apparent to the other vessel, and avoiding crossing ahead where circumstances allow Rule 16 (action by give-way vessel) and Rule 8 require any action to be positive, made in ample time, and large enough to be obvious to the other vessel by radar or visual observation — small or late alterations can be misread or insufficient.

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.