Nautical Calculator is an Android application that calculates rhumb line and great circle navigation.
The application is totally free.
The main functions are:
- Given two coordinates, great circle and rhumb line courses, distances, great circle vertex and meridional parts is calculated, is show graphics.
- Given a position, new position is determined by advancing it for courses and distances.

other features can be enabled.
- Calculate Average speed
- Waypoint route
- Route mix with parallel limit
- Rhumb Line Parallel/Meridian intersection
- Follow on same Rhumb Line route
- Collision on same Rhumb Line route
- Calculate Amplitude at sunset and sunrise and magnetic compass deviation
- Solves Drift problem
- Solves Tides problem
- ABC Tables (azimuth, initial course, right ascension with unknow star)
- Nautical almanac
- Celestial Navigation with position line
- Meridian transit
- Celestial observation

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https://www.facebook.com/NauticalCalculator