The masthead light should be visible in a 225 degree arc centered on dead ahead.
When a powerboat is operating at night, the white masthead light must be visible from both the front (fore) and the sides of the vessel. It should be mounted at least 1 meter above the sidelights and visible from an angle of 225 degrees. This ensures that other vessels can see the powerboat's position and direction of travel, enhancing safety on the water.
When operating a powerboat at night, your green sidelight must be visible to boats approaching from the starboard (right) side. This is crucial for signaling your position and direction of travel to other vessels. Additionally, the red sidelight on the port side must be visible to boats approaching from the port side. Together, these lights help ensure safe navigation and collision avoidance on the water.
When operating a powerboat at night, your red sidelight must be visible to boats approaching from the port (left) side. This is important for indicating your vessel's orientation and direction of travel to others. Additionally, your green sidelight on the starboard (right) side should be visible to boats approaching from the starboard side. Proper visibility of these lights helps prevent collisions and ensures safe navigation.
A powerboat less than 39.4 feet long is anchored at night white light must be visible from all directions.
If you are operating a powerboat at night your green side light must be visible to boats approaching over an arc of the horizon 112.5 degrees and so fixed as to show the the light from right ahead to 22.5 degrees abaft of the beam on its respective side.
The masthead light on a vessel should be visible from the front and sides, specifically from 22.5 degrees on either side of the bow, extending to the stern. This light is white and must be displayed from sunset to sunrise, ensuring that other vessels can see your boat's heading and position. Proper visibility of the masthead light is crucial for safe navigation and collision avoidance at night.
Rule 21 of the Navigational Rules of the Road. (a) "Masthead light" Means a white light placed over the fore and aft center-line of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed to show the light from right ahead to 22.5 degrees abaft of the beam on either side of the vessel, except that on a vessel of less than 12 meters (39'4") in length the masthead light shall be placed as nearly as practical to the fore and aft center-line of the vessel.
Rule 21 It must show an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft of the beam.
The arc of visibility for a masthead light is 225 degrees. This means that the light must be visible from dead ahead to 22.5 degrees abaft the beam on either side of the vessel.
On a powerboat, the white navigation light is typically located at the stern, or rear, of the vessel. This light is positioned so that it is visible from behind the boat, ensuring that other vessels can detect its presence when approaching from the rear. It is part of the required navigation lights for nighttime operation, helping to indicate the boat's position and direction.
A white light on a powerboat (that obviously doesn't have a mast) must be displayed so as to be visible from 360 degrees.
You are approaching a powerboat head-on