Due to the Covid-19 virus Captains is temporarily suspending orders


Nautical Slide Rule

The Nautical Slide Rule offers a foolproof immediate solution to all common speed/time/distance problems and is convertible to statute or nautical miles.


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. Lifetime warranty.


  • Time Speed Distance Calculator
  • Easy to use in statute or nautical miles