Weems & Plath 111 Compute-A-Course

The Compute-A-Course is a compact, multi-purpose plotting tool ideal for adding to your general boating or commercial navigational tools. The Compute-A-Course navigational tools can be used for position fixing, course plotting, and distance measurements with the included scales. Using the log scale on the instructions of the navigational tools makes time and distance calculations are a breeze. The Compute-A-Course is packaged with instructions for the navigational tools in a reusable zip lock storage bag. The navigational tools include a lifetime warranty