In reduced visibility, a power-driven vessel underway is required to sound one prolonged blast followed by two short blasts every two minutes. This signal indicates its presence to other vessels in the area. The prolonged blast lasts about four to six seconds, while the short blasts last about one second each. This signaling helps to prevent collisions in situations where visibility is limited.
A sailing vessel making way should signal, long-short-short every two minutes in fog.
its easy sound signal
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
one prolonged blast
one prolonged blast