Question 1

In good visibility, you are overtaking a vessel ahead on a parallel course, intending to pass on her port side. Is any sound signal required under Rule 34 in open water (not a narrow channel)?

Accepted Answer

In open waters (outside narrow channels covered by Rule 9(e)), Rule 34 does not impose a mandatory overtaking signal in the same way as the narrow channel signals — however, Rule 34(d) allows sounding the "doubt/danger" signal (five short and rapid blasts) if the intentions or actions of the other vessel are not understood, and good practice/Rule 8 still favour making intentions clear, e.g. via early and apparent course alteration The specific overtaking signals (prolonged + short blasts) in Rule 34(c) apply to the narrow-channel overtaking scenario under Rule 9(e) — in open water, there is no equivalent mandatory signal, though the general doubt/danger signal (Rule 34(d)) remains available if needed, and clear, early manoeuvring remains the primary way of communicating intent.

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.