Rules of the Road
Rule 35
Sound Signals in Restricted Visibility
(C) A vessel not under command, a vessel restricted in her ability to maneuver, a vessel constrained by her draft, a sailing vessel, a vessel engaged in fishing, and a vessel engaged in towing or pushing another vessel shall..........sound at intervals of not more than two minutes, three blast in succession, namely one prolonged followed by two short blasts.
One prolonged blast followed two short blasts, every two minutes, not to exceed two minutes. Rule 35-Sound Signals in restricted visibility.
A vessel that sounds the same fog signal whether underway or at anchor is a sailing vessel. According to the International Regulations for Preventing Collisions at Sea (COLREGs), a sailing vessel under sail alone is required to sound one prolonged blast followed by two short blasts. This signal is used to indicate its presence and position in reduced visibility conditions, regardless of its status.
A power-driven vessel under way sounds one prolonged blast not less than every two minutes. However if it is less than 12meters in length it is not required to give any signal.
When a powerboat is underway, you should hear the sound of its engine running, which indicates it is in motion. Additionally, the boat may use a sound signal, such as a horn or whistle, to communicate its presence to other vessels, especially in crowded or restricted waters. Common signals include one prolonged blast for a powerboat moving away from the dock and short blasts to indicate maneuvers. Always be aware of these sounds for safety on the water.
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.
The amplitude of a signal is the measure of the maximum magnitude of the signal from its equilibrium value. It represents the strength or intensity of the signal. A higher amplitude indicates a stronger signal, while a lower amplitude indicates a weaker signal.
Check that traffic is clear and signal before getting underway.
In restricted visibility, a power-driven vessel underway is required to sound one prolonged blast followed by two short blasts every two minutes. This signal indicates the vessel's presence and helps to communicate its intention to other vessels in the vicinity. The prolonged blast lasts for about four to six seconds, while each short blast lasts for about one second.
The sound signals that it is a sailing vessel underway when you hear one prolonged blast plus two short blasts every two minutes.
The sound signals that it is a sailing vessel underway when you hear one prolonged blast plus two short blasts every two minutes.
None. A vessel underway under normal conditions does not need to make any sound signal.If the vessel ceases to make way it still does not make a sound signal unless special circumstances apply.
PG Signal (Gray)- Indicates to the motherboard that all the supplies given are at proper level.