Types of Lights

Port Sidelight – Displays a red light on the port side (left), showing an unbroken light over an arc of the horizon of 112.5 degrees.

Starboard Sidelight – Displays a green light on the starboard side (right), showing an unbroken light over an arc of the horizon of 112.5 degrees.

Sternlight – A white light placed as close as possible to the stern (back), showing an unbroken light over an arc of the horizon of 135 degree.

Masthead Light – A white light placed over the fore and aft centerline of the vessel, showing an unbroken white light over an arc of 225 degrees.

Towing Light – A yellow light having the same characteristics as a sternlight.

All-round Light – A light showing an unbroken light over an arc of the horizon of 360 degrees.

Flashing Light – A light that flashes at regular intervals, at a frequency of 120 or more per minute.

Special Flashing Light – A yellow light that flashes at a frequency of 50-70 flashes per minute. It is mounted as far forward over the front and rear centerline of the vessel. It displays an unbroken arc of yellow light no less than 180 degrees and no more than 225 degrees.

Blue Flashing Light – An all-round blue light that flashes at regular intervals of 50-70 flashes per minute. Police boats and Canadian Coast Guard Auxiliary boats display blue flashing lights.