Weems & Plath Nautical Slide Rule

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The Nautical Slide Rule offers a foolproof, immediate solution to all common speed/time/distance problems and is convertible to statute or nautical miles. It also allows the user t o compute distance in yards if the speed is factored in knots. The Nautical Slide Rule is sometimes referred to as a Time Speed Distance Calculator. 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 miles, or yards if speed is in knots Easy-to-read & accurate Lifetime warranty Show more