Question 1

Under the Collision Regulations, in what circumstance does Rule 13 (Overtaking) apply instead of Rule 19 (Conduct of Vessels in Restricted Visibility), and can both rules apply at the same time?

Accepted Answer

Rule 13 only applies in clear visibility and Rule 19 only applies in restricted visibility — they address different circumstances (overtaking aspect vs. visibility conditions) and can both be relevant if an overtaking situation develops in restricted visibility Rule 13 defines when a vessel is overtaking another (approaching from more than 22.5° behind the other vessel's beam) and requires the overtaking vessel to keep clear, regardless of visibility conditions. Rule 19 sets out conduct for vessels in restricted visibility, including actions to take on hearing a fog signal apparently forward of the beam. The two rules address different aspects (relative bearing/overtaking duty vs. visibility-driven conduct) and can apply concurrently — for example, an overtaking vessel in fog must still comply with both its overtaking obligations and Rule 19's requirements.

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.