These calculations help you find your way using the sun, moon, stars, and planets.
Easily and quickly convert chart scales, nautical and statute miles, fathoms, feet, meters and more.
Whether you're looking for the length of a degree, the distance of an object, horizon, dip of the sea, or meridional parts, this Nautical Calculator makes it quick and simple.
You'll find essential logarithmic and trigonometric functions built into this robust calculator including log10, sine, cosine, tangent, cotangent, secant, and cosecant.
Our Great Circle Sailing calculator includes waypoints and full tracks at 5° intervals, and the Mercator Sailing calculator includes a cumulative distance function
We've included a clock that displays your desired time zone, a map that depicts all nautical time zones and a chart that lists their zone descriptions, coordinates and suffix.
Direction and Speed of True Wind, Corrections for Barometer Readings, Temperature Conversions and more.
In addition to an explanation for each navigation table and calculation, we've also included the complete text of the "The American Practical Navigator" by Nathaniel Bowditch and a six-volume set of sight reduction tables.
We've included a search function to find a calculation and a feature to bookmark and manage frequently used calculations.