The Course and Leg Identifier is a marine plotter used for expanding square patterns and sector pattern searches. Also known as a Search Pattern Slide Rule or Coast Guard Plotter, this plotter is a "must have" for active duty U.S. Coast Guard, Auxiliarists, or anyone who needs to run a search pattern. The Course and Leg Identifier quickly calculates both heading and run time for each leg of the search pattern, allowing more time to focus on the search itself.   For expanding square pattern and sector pattern searches Packaged with instructions in a reusable ziplock storage bag Limited Lifetime Warranty ( Learn more )