Question 1

In Rule 8(d), the rule states that action taken to avoid collision shall be such as to result in passing at a safe distance, and the effectiveness of the action shall be carefully checked. What does this requirement to "check" the action imply practically?

Accepted Answer

After taking avoiding action, the OOW must continue to monitor the other vessel (visually, by radar/ARPA, by bearing checks) to confirm the action is actually producing the intended increase in CPA/passing distance — if it is not (e.g. the other vessel has also altered course in a way that reduces the benefit, or the alteration was insufficient), further action under Rule 8 may be required Rule 8(d) is often overlooked — taking action is not a "fire and forget" event; the OOW must verify the action is working as intended, since the other vessel's own actions (or lack of expected response) can change the picture, requiring further adjustment.

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.