Question 1

Rule 18 (Responsibilities Between Vessels) sets a hierarchy of which vessels should generally keep out of the way of others (except where Rules 9, 10 and 13 require otherwise). In the general hierarchy, which of these is correctly ordered from 'keeps clear of others' toward 'others generally keep clear of it'?

Accepted Answer

Power-driven vessel → sailing vessel → fishing vessel → vessel constrained by her draught → vessel restricted in her ability to manoeuvre → vessel not under command Rule 18 establishes that, broadly, a power-driven vessel underway shall keep out of the way of: a vessel not under command; a vessel restricted in her ability to manoeuvre; a vessel engaged in fishing; and a sailing vessel — with vessel constrained by her draught and vessel not under command sitting at the 'most privileged' end (subject always to Rules 9, 10 and 13, and to the special considerations for vessels constrained by their draught and seaplanes).

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.