Question 1

In restricted visibility, what fog signal must a vessel at anchor make under Rule 35, and at what interval?

Accepted Answer

Rapid ringing of the bell for about 5 seconds, at intervals of not more than one minute (and on vessels of 100m or more in length, also a gong sounded in the after part of the vessel immediately after the bell) Rule 35(g) requires a vessel at anchor to ring the bell rapidly for about 5 seconds at intervals of not more than one minute — distinct from the whistle signals used by vessels underway, helping other vessels distinguish anchored from moving traffic in fog.

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.