Solar Compass by iMariner app for iPhone and iPad

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Utilities Navigation
Developer: DFR Editions

Free

Current version: 3.3, last update: 1 year ago
First release : 19 Mar 2012
App size: 3 Mb

Accordingly with your position and time, the sun and moon positions are refreshed in real time into the compass rose.

You should rotate the wind rose with your fingers until the rose reach the Sun or the Moon.
The rose immediately displays the TRUE NORTH.

This application can be very usefull for the mariner navigating in uncertain magnetic areas or to calibrate its main compass.