3 calculators in this category
- Distance to Horizon & Visibility Range CalculatorBowditch, The American Practical NavigatorYour horizon at sea is closer than most people expect: from a cockpit nine feet above the water it is only 3.5 nautical miles…
- Anchor Rode & Scope CalculatorScope measured from bow roller to seabedScope is the ratio of rode deployed to the vertical distance from your bow roller down to the seabed — and that vertical…
- GPS Coordinate Conversion Calculator (DMS to Decimal)WGS 84 geodetic coordinatesChart plotters, aviation databases, survey reports and mapping websites all quote latitude and longitude differently, and…
Which one do you need?
- Distance to Horizon & Visibility Range Calculator
- Find how far the horizon lies from your height of eye in nautical miles, statute miles and kilometers, plus the geographic range of a light or radar.
- Anchor Rode & Scope Calculator
- Work out how much anchor rode to deploy for your scope ratio using depth, tidal rise and bow roller height, and the swing circle radius that results.
- GPS Coordinate Conversion Calculator (DMS to Decimal)
- Convert latitude and longitude between decimal degrees, degrees and decimal minutes, and degrees minutes seconds, with hemisphere signs and UTM zone.