Question 1

A vessel towing a long tow is proceeding through a narrow channel where she has very limited ability to alter course quickly. Another vessel proposes to cross ahead of the tow at close range. How should this be assessed?

Accepted Answer

A vessel towing a long tow in a narrow channel may, depending on the specifics, be considered restricted in her ability to manoeuvre (Rule 3(g)) or at minimum has greatly reduced ability to alter course or stop quickly — the crossing vessel should recognise this constraint (per Rule 18 and general good seamanship) and avoid creating a close-quarters situation by crossing at close range A vessel with a long tow has substantially reduced manoeuvrability (turning, stopping) — whether formally "restricted in ability to manoeuvre" or not, other vessels should recognise this practical reality and avoid actions that assume normal manoeuvrability, particularly in confined waters.

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.