ai.Orthodrome vs Sextant

Whether you’re a sailor, aviator, or traveler, this app is your ideal companion. Discover the reasons behind your flight’s route over Greenland with OrthoFinder! Discover OrthoFinder, the ultimate tool for quickly calculating the orthodrome (great-circle distance) on the map between selected points. Effortlessly export lists of segments with locations and desired courses in various formats, including PDF, CSV, GPX, or copy to clipboard. Compare orthodrome and loxodrome routes, and analyze the distance difference. The app also includes a watch version (excluding export options). Features: * Calculate orthodromes between points * Compare orthodrome with loxodrome and distance difference * Export segments in PDF, CSV, GPX, or clipboard * Intuitive interface for easy navigation * Watch version available (export options not included) In-App Purchases: In the free version of the application, you initially have five available export options. Each export operation (whether to PDF, CSV, GPX, or clipboard) consumes one of these options. Once you reach the limit, you can purchase additional export options in increments of five or ten. Alternatively, you can opt for the full version, which eliminates all such limitations. * Free Version Export Limit: 5 exports initially available * Additional exports purchasable in increments of 5 or 10 Applied Standard Apple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

A complete celestial navigation toolkit for sailors, students, and the curious. When the GPS quits, the sun, moon, planets, and stars still work. Sextant takes you all the way from a single sextant reading to a line of position on a map — with every correction shown, so you can check the math by hand if you want to. Point the camera at the sky The Sky tab labels every navigational body in view — the sun, the moon, all four navigational planets, and 58 navigational stars — using the magnetic compass and on-device ephemeris. Spot a star, tap its name, and a sight starts with that body identified and the time stamped. Sight with your camera, or a real sextant The camera flow measures altitude along the camera's line of sight from the phone's gravity sensor and shows how upright you're holding it. Multi-shot mode takes a series and saves the trimmed mean. Or just type your altitude from a brass sextant and let the app do the reduction. Every body you'll ever shoot Sun, moon, all four navigational planets — Venus, Mars, Jupiter, Saturn — and all 58 standard navigational stars. Positions computed from astronomical theory (VSOP87 for the Sun and planets, ELP-2000 for the Moon, star positions with precession and proper motion), not stale tables, and tested against U.S. Naval Observatory data. Works fully offline. Noon Sight in one tap Take the sun's altitude at meridian passage; the app gives you latitude. It also predicts the exact UTC of local apparent noon so you know when to look. Plot your fix Every sight draws a line of position on a real map. Take more than one, apply dead reckoning between them, watch your running fix come together — exactly like the paper-chart workflow. Tools sailors actually use - Polaris one-shot latitude - Solar Compass — true bearing of the sun, for compass deviation checks - Starfinder — what's above the horizon right now - Reduction tables (dip, refraction, semi-diameter) - DMS / decimal converter Learn celestial navigation as you go Step through your first sight with a guided walk-through. Every screen has inline help, and every correction in the sight reduction — dip, refraction, semi-diameter, parallax — has an explanation a tap away. Check the app against your hand calculations, or let it do all the work. Share your work Export sight records as CSV or as a printable PDF work-form in the classic HO 229 layout. No subscription. No ads. No internet. One purchase, everything included.