What is Sector Light?

A sector light is a fixed aid to navigation that displays a light of different colours and/or rhythms over designated arcs. The colour of the light provides directional information to the mariner.


Description of Sector Lights

A sector light may be used:

  • To provide directional information in a fairway;
  • To indicate a turning point, a junction with other channels, a hazard or other items of navigational importance.
  • To provide information on hazard areas that should be avoided.
  • In some cases a single directional light may be used.
  • Lights may have oscillating boundaries.
  • Rhythm as appropriate.