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 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
A bell ringing rapidly for 5 seconds every minute is the signal for a vessel at anchor in restricted visibility.
In restricted visibility, a power-driven vessel underway is required to sound one prolonged blast every two minutes. This signal alerts other vessels to its presence and intentions. Additionally, if the vessel is making way through the water, it may also sound two short blasts after the prolonged blast.