The Weems and Plath Nautical Slide Rule (often referred to as a Time Speed Distance Calculator.) offers an easy and immediate solution to all common speed, time, and distance calculations.
This Nautical Slide Rule also allows the user to compute distance in yards if the speed is factored in knots.
- Immediate solution to all speed-time-distance problems
- Equally applicable for nautical or statute miles
- Speed in knots or mph; time in hours, minutes or seconds; distance in nautical or statute mils (or yards if speed is in knots).
- Easy to read and accurate
- Standard issue for U.S. Navy
- Weems and Plath lifetime warranty