To help boaters navigate within channels, range markers have been erected in many Oregon rivers and bays. These consist of widely separated, brightly painted pairs of markers. They are mounted on skeleton towers or on pilings and may be in the water or on shore. Consult the appropriate navigation chart for locations of range markers. Steering a course that keeps the two range markers lined up vertically while operating in a channel marked by buoys will keep the vessel within the navigable channel.
Range markers come in pairs, one taller than the other. The pair will line up vertically if you are steering through the center of the channel.