In restricted visibility, a power-driven vessel under way is required to sound one prolonged blast followed by two short blasts at intervals of not more than two minutes. This signal indicates the vessel's presence and helps other vessels determine its position and heading. The prolonged blast lasts about four to six seconds, while each short blast lasts about one second. Additionally, vessels may also sound the signal to indicate their intent to maneuver or when they are overtaking another vessel.
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.
A vessel at anchor or aground in restricted visibility
one prolonged blast
one prolonged blast
one prolonged blast
One prolonged blast
In restricted visibility, a power-driven vessel under way is required to sound one prolonged blast every 2 minutes. This signal is used to indicate the vessel's position and to alert other vessels in the vicinity. The prolonged blast lasts for about four to six seconds.
In restricted visibility, a power-driven vessel underway is required to sound one prolonged blast every 2 minutes. This signal indicates the vessel's presence and helps prevent collisions when visibility is limited. The prolonged blast typically lasts about 4 to 6 seconds.
A power-driven vessel underway in restricted visibility is required to sound one prolonged blast at intervals of not more than two minutes. This signal indicates the vessel's presence and helps prevent collisions. Additionally, if the vessel is making way through the water, it may also sound two short blasts to indicate its maneuverability.
One prolonged blast
one prolonged blast