Observe and identify
Foundation level, about 2 min. IALA Region B.
The situation
A navigation mark lies ahead. Inspect its body colour, paint pattern and topmark with the binoculars. Interpret it using the stated buoyage region.
Which mark is this, and what does it tell you?
- Port-hand mark · Region B
- Starboard-hand mark · Region B
- Preferred channel to starboard · Region B
Answers and explanations
Lookout: Can and cylinder mean port; use Region B for the colour.
The sound answer
Port-hand mark · Region B
Green can-shaped lateral mark. Following the conventional direction of buoyage, leave it to port. Region B reverses the lateral colours while retaining the port-hand can shape.
Why the other options fall short
Starboard-hand mark · Region B
Red conical lateral mark. Following the conventional direction of buoyage, leave it to starboard. The region does not determine which collision-rule jurisdiction applies. Here the observed cue identifies port-hand mark · region b. Green can-shaped lateral mark. Following the conventional direction of buoyage, leave it to port. Region B reverses the lateral colours while retaining the port-hand can shape.
Preferred channel to starboard · Region B
A green port-hand form with a broad red band marks a junction. Following buoyage, leave it to port for the preferred branch to starboard. Identify the dominant colour and shape together. Here the observed cue identifies port-hand mark · region b. Green can-shaped lateral mark. Following the conventional direction of buoyage, leave it to port. Region B reverses the lateral colours while retaining the port-hand can shape.
Lateral marks · Region B
Green can-shaped lateral mark. Following the conventional direction of buoyage, leave it to port. Region B reverses the lateral colours while retaining the port-hand can shape.