Question 1

A vessel altering course to starboard in sight of another vessel sounds:

Accepted Answer

One short blast. Rule 34(a) manoeuvring signals: one short blast (•) = I am altering course to starboard; two short blasts (••) = I am altering course to port; three short blasts (•••) = I am operating astern propulsion. A short blast is approximately 1 second duration. These are IN SIGHT signals, not used in restricted visibility.

Question 2

A vessel in doubt about whether another vessel is taking sufficient action to avoid collision shall sound:

Accepted Answer

At least five short and rapid blasts on the whistle. Rule 34(d): when vessels in sight of one another are approaching each other and either vessel fails to understand the intentions or actions of the other, or is in doubt whether sufficient action is being taken to avoid collision, the vessel in doubt shall immediately indicate such doubt by giving at least five short and rapid blasts on the whistle. This is the DANGER signal.

Question 3

Rule 34(b) prescribes a light signal to accompany manoeuvring sound signals. What is this signal?

Accepted Answer

One, two or three flashes of a white light, each flash lasting approximately one second during manoeuvring.. Rule 34(b): a vessel may supplement the sound signals prescribed in paragraph (a) by light signals, repeated as appropriate, while the manoeuvre is being carried out. Such light signals shall have the following significance: one flash = altering to starboard; two flashes = altering to port; three flashes = operating astern propulsion. The flashes shall be of approximately one second duration. The light shall be an all-round white light visible at 5nm.

Rule 34, questions and explanations

A vessel altering course to starboard in sight of another vessel sounds:

A vessel in doubt about whether another vessel is taking sufficient action to avoid collision shall sound:

Rule 34(b) prescribes a light signal to accompany manoeuvring sound signals. What is this signal?

Practise this properly

Rule 34, questions and explanations

Questions

A vessel altering course to starboard in sight of another vessel sounds:

A vessel in doubt about whether another vessel is taking sufficient action to avoid collision shall sound:

Rule 34(b) prescribes a light signal to accompany manoeuvring sound signals. What is this signal?

Practise this properly