Question 1

Your examiner asks: "Rule 3 defines 'in sight of one another.' Why does this definition matter for deciding whether Rules 11-18 (the steering and sailing rules for vessels in sight of one another) or Rule 19 (restricted visibility) apply?"

Accepted Answer

Rule 3(k) states vessels are deemed to be in sight of one another only when one can be observed visually from the other — so in fog or heavy rain where vessels can only be detected by radar, they are NOT in sight of one another, and Rule 19 (not the give-way/stand-on hierarchy of Rules 11-18) governs, even if both vessels can see each other clearly on radar This definition is the hinge between two completely different sets of obligations — Rules 11-18 (give-way/stand-on) only apply between vessels that can see each other visually. A radar contact in fog is not "in sight," however clear the picture, which is precisely why Rule 19 exists as a separate, equal-obligation regime rather than just a visibility-adjusted version of Rules 11-18.

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.