The sound signal that you should hear when a power boat is in the fog is one prolonged blast at intervals of no more than 2 minutes.
one prolonged blast
A Fog Horn.
None. A vessel underway under normal conditions does not need to make any sound signal.If the vessel ceases to make way it still does not make a sound signal unless special circumstances apply.
stay with the boat and signal for help.
stay with the boat and signal for help.
A signal sound device
3 short blasts
If you hear a fog signal from another boat but cannot see it, you should reduce your speed and maintain a proper lookout. Use radar and other navigation aids to help determine the other vessel's position. Be prepared to take evasive action if necessary, and sound your own fog signal to alert others to your presence. Always stay vigilant and ready to respond to any potential hazards.
Stay aground and signal for assistance
Slow to minimum speed
A motorboat approaches you head-on and sounds one short blast. You would prefer to pass the boat on your starboard right side. Five or more blasts is the signal that you should you use to indicate your disagreement.
Powerboat A should turn to the left when power boat B is crossing its path.