Question 1

If you are told to keep a lookout and it starts raining heavily, reducing visibility, your job effectively becomes less important because radar will pick up anything you'd otherwise see.

Accepted Answer

False False — the opposite is true. Rule 5 specifically requires a lookout "by sight and hearing as well as by all available means" — radar supplements the lookout, it doesn't replace it. In reduced visibility a human lookout listening for fog signals and watching for loom of lights becomes more important, not less, since radar has known limitations (small/wooden craft, sea clutter, blind sectors) that a human sense can sometimes catch first.

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.