Observe and identify
Foundation level, about 2 min. International COLREGs / IRPCS.
The situation
A power-driven vessel underway is in sight of you and manoeuvring in open water under International Rules.
What can you conclude from the signal in these circumstances?
- She is altering course to port
- She is altering course to starboard
- She proposes a port-to-port passing
Answers and explanations
Lookout: Use the situation as well as the sound. Listen to the full sequence before deciding.
The sound answer
She is altering course to port
Altering course to port. A power-driven vessel underway, in sight of another vessel, announces a manoeuvre authorised or required by the rules.
Why the other options fall short
She is altering course to starboard
Altering course to port. A power-driven vessel underway, in sight of another vessel, announces a manoeuvre authorised or required by the rules.
She proposes a port-to-port passing
Altering course to port. A power-driven vessel underway, in sight of another vessel, announces a manoeuvre authorised or required by the rules.
Rule 34(a) · Two short blasts
Altering course to port. A power-driven vessel underway, in sight of another vessel, announces a manoeuvre authorised or required by the rules.