In restricted visibility, a power vessel underway must give way to vessels constrained by their draft, such as a ship in a narrow channel. It is also required to sound appropriate signals, typically one prolonged blast followed by two short blasts, to indicate its presence. Additionally, the vessel must maintain a safe speed to avoid collisions and be prepared to take evasive action if necessary. Following the International Regulations for Preventing Collisions at Sea (COLREGs) is essential in these conditions.
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 indicates the vessel's presence and helps prevent collisions when visibility is limited. The prolonged blast typically lasts about 4 to 6 seconds.
one prolonged blast
one prolonged blast
One Prolonged Blast.
One prolonged blast
one prolonged blast
One Prolonged Blast.
one prolonged blast
One prolonged blast
One horn blast every two minutes.