Theory Test Training
Sound Signals
In low visibility conditions, you must be able to identify the types of vessels around you, and concisely communicate with them. This is done via sound signals. Good knowledge of these can be essential to your safety on the water.
This section contains the most common sound signals you will hear from other vessels.
A Dash "–" represents a long sound 4 to 6 seconds in length. A Dot "." represents a short sound of 1 second or less. We’ve made the images simple, using a similar format to the one you’ll find on your Day Skipper, Day Skipper Coastal and Yachtmaster exams.
Agreement / acknowledgement by vessel being overtaken.
(IN FOG) Vessel less than 100 metres in length at anchor.
(IN FOG) At anchor - Warning of a collision.
(IN FOG) Motor vessel is under way and making way.
(IN FOG) Motor vessel underway but not making way.
(IN FOG) Sound made by all hampered vessels (trawlers, fishing boats, sail boats, NUC, RAM and CBD).
I intend to overtake you on your port side.
I intend to overtake you on your starboard side.
Piloted vessel with pilot on board.
Five or more short sounds. Please make your intentions clear / Get out of the way.
I am turning to starboard.
Vessel at anchor. Over 100 metres in length.
Vessel is approaching a blind bend.
Last vessel being towed.
I am turning to port.