Radar Collision Avoidance and Current Plotting Board Set

Provides the mariner with an easy method for plotting radar targets to determine their course speed and possible risk of collision. Where current exists, navigators can also use the board for determining course to steer. Complete instructions and examples from the Editors of Ocean Navigator Magazine are printed on the back. Constructed of matte finished, film laminated PVC, the board is designed to be used with a lead pencil for accuracy, then erased. Provided complete with a special suction cup/pencil point compass. Dims: 13" square. Wt. 8 oz.