Weems & Plath Nautical Slide Rule - 105

Sometimes referred to as a Time Speed Distance Calculator, the Weems & Plath Nautical Slide Rule gives an immediate solution to all speed-time-distance problems. It even allows the user to compute distance in yards if the speed is factored in knots.

Features:

• Gives an immediate solution to all speed-time-distance problems
• Computes distance in yards if the speed is factored in knots
• Sometimes referred to as a Time Speed Distance Calculator
• Speed in knots or MPH, time in hours, minutes, or seconds, and distance in nautical or statute miles (or yards if desired, and if speed is in knots)
• Easy to read and accurate
• Standard in U.S. Navy
• Dimensions: 7 3/8" square
• Lifetime warranty