Mountainous amounts of astronomical documentation, calculators, drawing utensils and the ability to handle it all was until recently state of the art to be able to navigate with the sun or any other celestial body.

That’s over, and anyone can now navigate using a sextant, a mobile device and the sun, without having attended a training and without needing to have any knowledge of mathematics or astronomy.

The decision to carry an astronavigation backup on board in the sense of good seamanship is thus made much easier, and even in the face of three independent satellite navigation systems.