Check the listing for details. THE USPS COURSE PLOTTER Measure Courses & Bearings Air Force Navy Weems READ!. Condition: Used. Listed at 9.95 USD. Normal 0 false false false EN-US X-NONE X-NONE For consideration is THE USPS COURSE PLOTTER in protective sleeve with Instructions For Use. The U.S. Power Squadron Plotter is a great, simple, versatile chart navigation plotter. It is designed by the United States Power Squadrons and manufactured by Weems & Plath. The USPS is an organization dedicated to making boating safer and more enjoyable by teaching classes in seamanship, navigation and related subjects. Basic instructions that demonstrate its use to draw a course line, read a course, and determine coordinates are included. A detailed instruction sheet for its many uses can be downloaded in pdf. format from the USPS website. Please see photos for additional information. OleTooks Ships Fast and Secure USPS First Class Mail.