Question 1

The Strait of Gibraltar is one of the busiest shipping lanes in the world. What does MAIB's investigation suggest this means for watchkeeping standards in fog specifically in this area?

Accepted Answer

High traffic density and restricted visibility both independently raise the standard of watchkeeping required, and together they compound the risk if that standard isn't met MAIB's hf_narrative identifies fog in a high-traffic area as compounding the risk — the busier the lane, the less margin there is for a misread AIS picture or a distraction to go uncorrected before a close-quarters situation develops.

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.