Nautical Almanac

Maksym Skrypkin

In-app purchases

About this app

Nautical almanac – calculates azimuth, height and other celestial almanac information for Sun and Moon, primary navigation stars and navigation planets: Venus, Mars, Jupiter, Saturn.
In addition, for magnetic compass error calculation, finds Variation (Mag. Declination) for given positon. Calculation of variation is based on the latest World Magnetic Model.
Gyro and magnetic compass error calculator.

Ratings and reviews

Good job! Makes celestial navigation simple! This app gets your position using Saint-Hilaire's Intercept method. It uses built-in data that appears to agree with the published Nautical Almanac and a Sight Reduction routine to get the angle-up to a celestial body as well as the true compass bearing to it from a selected lat/long near your estimated position. Doing this for two different nearby selected lat/long positions along with a sextant sighting of that celestial body and noting the time will give the distances between the selected positions and estimated position since a difference in angle equals a difference in distance. These two distances along with the selected lat/longs are used to get your true position.

Edit: hard to scroll in the catalog, it won't move and then the left drawer opens instead of scrolling. I will use the old UI until it is fixed. Does what it says it does and accurate at least to my measurements. Hopefully updates to the reference data will come as time goes on, but for my purposes the little bit of drift that must be present is negligible. Thanks for the quality app.

My dad loves this app and we thank you for it! You'll never understand our gratitude for having this app. In the old days, without this, he had to purchase a separate machine for his calculations which cost much more. I wish I could donate the amount I'd like, which far exceeds the amount dictated here on the app. Nevertheless, I've made multiple purchases in the hope that you've gotten them all. You're doing a great thing ❤

What's new

Sky view added