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Submarines only use very few lights:

1. Bow and Stern (rudder) lights - the Bow light is contained withing the jackstaff, and is only used in port while moored or anchored. The Rudder light is used while underway surfaced, along with the Port/Starboard lights.l

2. Port and Starboard Navigation lights - like all vessels, submarines use Port (Red) and Starboard (Green) navigation lights, which are located on the submarine's sail/fairwater.

3. Yellow Flashing Light - Submarines traveling on the surface at night use a raised mast with a flashing yellow beacon. The beacon, along with the other navigation lights, tell other ships that the vessel is a submarine, and which direction it's headed.

4. Security lights - Mounted on the sail in port, they are used as safety/security lights while moored or anchored.

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12y ago

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