Question 1

As the stand-on vessel in a crossing situation, you observe the give-way vessel altering course — but toward your own course, increasing risk rather than reducing it. What does this situation call for under Rule 17?

Accepted Answer

This is exactly the scenario Rule 17(a)(ii) anticipates — once it becomes apparent that the give-way vessel is not taking appropriate action (here, taking action that worsens the situation), the stand-on vessel may take action to avoid collision by her own manoeuvre, chosen so as to avoid an alteration to port for a vessel on her own port side where possible (Rule 17(c)) Rule 17 is not a rigid "never move" rule for the stand-on vessel — it permits action once it is apparent the give-way vessel's action (or inaction, or wrong action) is inadequate, with Rule 17(c) guiding the choice of action to avoid making things worse via an unexpected to-port alteration.

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.