A powerboat less than 39.4 feet long is anchored at night white light must be visible from all directions.
I believe it is a white masthead light.
The masthead light should be visible in a 225 degree arc centered on dead ahead.
A white light on a powerboat (that obviously doesn't have a mast) must be displayed so as to be visible from 360 degrees.
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 absence of visible light. If no light (or only a little light) is emitted from a particular direction, then when you look in that direction you will see black.
This white-colored light that must be visible from all angles is called an anchor light. It is usually situated atop the mast.
A white masthead light must be shown when a powerboat is operating at night.
Visible light causes reflection of light in all directions
This white-colored light that must be visible from all angles is called an anchor light. It is usually situated atop the mast.
When operating a powerboat at night white light should be shown on the stern and red and green lights on the bow.
An anchor light. Which is a white all round light, that is a light that can be seen for 360 degrees and visible for 1, 2 or 3 nautical miles, depending on the length of the vessel.
Visible light is a type of electromagnetic wave.