Now we get into the particulars of LIGHTS.

If a POWER-DRIVEN vehicle is UNDERWAY, then it must exhibit a MASTLIGHT forward and another one abaft of and higher than the forward one IF this vessel is 50 meters or more. If not then the second one is optional. In addition the vessel must have SIDELIGHTS and a STERN LIGHT.

If the vessel is a AIR-CUSHION vessel less than 50 meters then in addition to the normal lights it must have a FLASHING YELLOW LIGHT.

If the POWER-DRIVEN vessel is less than 12 meters, then the required lights are an ALL-AROUND WHITE LIGHT and SIDELIGHTS.

If it is power driven and less than 7 meters and its speed does not exceed 7 knots, then it is only required normally to have an ALL-AROUND WHITE LIGHT.

Hugh Simpson