The International Maritime Organisation (IMO) and National Authorities prescribe the number, position and power rating of navigation lights aboard ships. By far the most common arrangement is to have five specially designed navigation 'running' lights referred to as Fore mast, Main mast (or Aft mast), Port, Starboard and Stern. Two anchor lights fitted forward and aft, may also be controlled from the Navigation Light Panel. The sidelights are red for port and green for starboard while the other lights are white. Special incandescent filament lamps are used each with a power rating of 65W, but 60W and 40W ratings are permitted in some cases.
Fore
Mast (No. 1 & 2 or Up, Down)
Main or Aft Mast (No. 1 & 2 or Up, Down)
Stern light (No. 1 & 2 or Up, Down)
Port light (No. 1 & 2 or Up, Down)
Starboard light (No. 1 & 2 or Up, Down)Safeties are
Navigation light should be connected to a distribution board, which does not
supply other services
There should be a changeover switch, so that it can be transferred to another
source or power supply
Visual and audible alarms required for individual Navigation Light failure
(duel bulb system for change over)
Fuse protection provided
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