The USPS Plotter is a simple, versatile chart navigation plotter. It is constructed of durable, transparent plastic. It has no chips and is in EXCELLENT condition.
This plotter comes complete with basic instructions that include:
1. Measuring courses and bearings
2. Using the auxiliary protractor scale
3. Drawing a course or bearing from a point
4. Moving a line parallel to itself
5. Celestial lines of position
6. Extending a course line