For training or improving your skills with a marine sextant, an aircraft octant (bubble), an artificial horizon, or a theodolite. - Real time calculation of the instrumental altitude Hs for comparison of your shots. - Useful for index error determination. - For Sun, Moon, and navigational stars and planets. - Location on map of your position by GPS or manually. ("Location" App permission must be allowed. Switch on you GPS, and then au
tomatic location detection is possible) - Map: zoom, satellite, terrain and road map. ... Read more