Question 1

Under Rule 18, where does a "vessel not under command" sit in the overall order of priority relative to other vessel categories (sailing vessels, fishing vessels, restricted in ability to manoeuvre, normal power-driven vessels)?

Accepted Answer

A vessel not under command sits at (or near) the top of the priority order — other vessels (including those restricted in ability to manoeuvre, sailing vessels, fishing vessels and ordinary power-driven vessels) should generally avoid impeding her, since by definition she is unable to manoeuvre as required by the Rules The general hierarchy in Rule 18 places "not under command" and "restricted in ability to manoeuvre" vessels near the top, since by definition they cannot manoeuvre as the Rules would normally require — other vessels need to factor this into their own actions.

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.