BOATsmart! Base de connaissances du Canada 

Power-driven pleasure craft must exhibit a forward Masthead Light, Sidelights and a sternlight.

Many small boats (such as bow riders and runabouts) typically have a white light affixed to the top of a light pole that can be placed at the stern of the craft. When underway, this All-round light functions as a combined masthead and sternlight, and must be visible in all directions, mounted higher than the boat structure, cockpit or any other obstruction.