NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Andrés Ruiz
Date: 2023 Oct 25, 08:42 +0200
Navigational Algorithms Android apps have been updated to fulfil Google security policies.
https://sites.google.com/site/navigationalalgorithms/software/android
§ Equatorial geocentric coordinates: RA/GHA, Declination for Sun, Moon, and navigational stars and planets.
§ SD, HP
§ SHA
§ Visible sky: identification of stars and planets - it plots the visible sky from a position. Polar & horizon chart
§ Planning observation: phenomena - Twilight, - Rise/set for Sun and Moon, - Meridian passage
§ Solar time: GAT, LAT, LMT, Equation of time
§ Sidereal time (Aries): GHA, GAST, LAST, LHA
§ Lunar distances
§ Under development: SSD, ...
§ Real time calculation of the instrumental altitude Hs for comparison of your shots.
§ For training or improving your skills with a marine sextant, an aircraft octant, an artificial horizon, or a theodolite.
§ Useful for index error determination.
§ For Sun, Moon, and navigational stars and planets.
§ Location on map of your position by GPS or manually.
§ Latitude by Polaris
§ Noon sight
§ Sun ex-merian sight
§ Time sight for the Sun
§ Latitude by the Sun´s Altitude and Time
§ Calculated altitude Hc and azimuth Zn
§ Input for observed altitude Ho or instrumental Hs (Nautical Almanac data needed for the Sun and the Moon)
§ Calculator: Line of Position, intercept method (p=Ho-Hc, Zn)
§ Running fix
§ Plots up to 3 Marcq Saint Hilaire Lines of Position on Google maps
§ Local hour angle (LHA)
§ Old versions available at sourceforge
Fix by 2 CoPs - vector solution
§ For two sights, it calculates the two solutions, and plots the circles of position, or circles of equal altitude on a google map.
§ Running fix
§ Method explained in the papers:
§ Vector Solution for the intersection of two Circles of Equal Altitude.
§ Use of rotation matrices to plot a circle of equal altitude.
§ Variation for the current day. (Local magnetic variation or magnetic declination)
§ WMM2020 - World Magnetic Model 2020, valid from 10/12/ 2019 through 31/12/2024.
§ Route between a departure and a destination point, on Google map.
§ Rhumb line (loxodromic)
§ Great Circle (orthodromic). Waypoints of the great circle route.
§ Lines of Position: Bearing, range & horizontal angle
§ Plot on google maps.
§ Brief guide: Español English
Available on the app store: google play
Coastal Navigation includes new PDF help in Spanish and English.
