Rules of the Road, Rule 35, Sound Signals in Restricted Visibility.
(B) A power driven vessel underway but stopped and making no way through the water shall sound at intervals of not more than two minutes, two prolonged blasts in succession with an interval of about two seconds between them.
One prolonged blast
One prolonged blast
In restricted visibility, a power-driven vessel underway is required to sound one prolonged blast every 2 minutes. This signal is meant to indicate the vessel's presence to other nearby vessels in low visibility conditions. The prolonged blast lasts for about 4 to 6 seconds. This sound signal helps enhance safety by alerting others to the vessel's location, allowing for better navigation and collision avoidance.
whenever underway
Children under 16 are required to have a Coast Guard approved, properly fitted Personal Flotation Device (PFD) at all times while underway on recreational craft.
whenever underway
under 13
when on board a ski boat that is underway
Whenever it is underway
under 13
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.
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.