Sight reduction

Sight reduction

Celestial navigation. Take the sextant and get your Line of Position.

4.38 MAPS AND NAVIGATION
 Sight reduction
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Celestial navigation - Astronavigation

Sight reduction
- Marcq Saint Hilaire Line of Position intercept method (p=Ho-Hc Zn)
- Input for observed altitude Ho or instrumental Hs (Nautical Almanac data needed for the Sun and the Moon)
- Calculator altitude Hc and azimuth Zn
- Running fix
- Plots up to 3 Marcq Saint Hilaire Lines of Position on Google maps
- Local hour angle (LHA)

Sight reduction is the process of deriving from a sight the information needed for establishing a line of position.
This app is a calculator to get the intercept from the assumed position of the observer AP(latitude longitude) the geographical position of the celestial body observed GP(Dec GHA) and its corrected altitude Ho.
Manual and examples in the developer's website.

Ref https//en.wikipedia.org/wiki/Sight_reduction

User interface
- Zoom buttons +/-
- Map types standard terrain and satellite
- GPS location. ("Location" App permission must be allowed. Switch on you GPS and then automatic location detection is possible)


Video


About this version (4.3)

- Plot up to 3 Marcq Saint Hilaire Lines of Position on Google maps - Calculator for Intercept method (p=Ho-Hc, Zn) - Input for observed altitude Ho or instrumental Hs - List of navigational stars - Logbook - New optimized user interface - GNSS fix to check the solution

Details and Recent Ratings

Size: 2 MB
Version: 4.3 by Navigational Algorithms
Updated: 01 May 2020 (178 days ago)
Released: 21 July 2014
Installations: more than 10 000
 Sight reduction
5 Stars: 75
4 Stars: 14
3 Stars: 9
2 Stars: 4
1 Star: 5

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