Nautical Slide Rule Weems & Plath
Nautical Slide Rule offers a reliable, immediate solution to all common speed/time/length problems and can be converted to a nautical mile. This slider even allows you to calculate the distance in yards if speed is included in the knots.
Easy to read and operate, Nautical Slide Rule is standard in the U.S. Navy.
Weight: 46 g
Dimensions: 7-3/8″ (187 mm)
