One prolonged blast
one prolonged blast
one prolonged blast
one prolonged blast
One prolonged blast
one prolonged blast
One prolonged blast should be sounded every two minutes.
One prolonged blast should be sounded every two minutes.
one prolonged blast every 2 minutes
One prolonged blast should be sounded every two minutes.
One horn blast every two minutes.
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.
Rules of the Road Rule 35 Sound Signals in Restricted Visibility/International (a) A power driven vessel making way through the water shall sound at intervals of not more than 2 minutes one prolonged blast.