Sight reduction
6.4 12
v4.12 by Navigational Algorithms
About Sight Reduction
Sight Reduction (Package Name: com.Sightreduction) is developed by Navigational Algorithms and the latest version of Sight reduction 4.12 was updated on May 4, 2025. Sight reduction is in the category of Maps & Navigation with the feature Travel & Local. You can check all apps from the developer of Sight reduction and find 200 alternative apps to Sight reduction on Android. Currently this app is for free. This app can be downloaded on Android 5.0+ on APKFab or Google Play. All APK/XAPK files on APKFab.com are original and 100% safe with fast download.
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 for Intercept method (p=Ho-Hc, Zn) altitude Hc and azimuth Zn
- Running fix
- Plots up to 3 Marcq Saint Hilaire Lines of Position on Google maps
- Local hour angle (LHA)
- List of navigational stars
- Logbook (output is copied to clipboard)
- New optimized user interface
- GNSS fix to check the solution
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)
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 for Intercept method (p=Ho-Hc, Zn) altitude Hc and azimuth Zn
- Running fix
- Plots up to 3 Marcq Saint Hilaire Lines of Position on Google maps
- Local hour angle (LHA)
- List of navigational stars
- Logbook (output is copied to clipboard)
- New optimized user interface
- GNSS fix to check the solution
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)
Sight Reduction 4.12 Update
Upgraded to:Android 16 - SDK 36
new Google Maps 'com.google.android.gms:play-services-maps:19.2.0'
Read More
Sight Reduction Features
Related Videos
Sight Reduction - android App
Previous Versions
More
Variant
Arch
Version
DPI
27
April 29, 2025
Sight reduction
4.12
(27)
Requires Android: Android 5.0+
Screen DPI: 160-640dpi
SHA1: 44242dcc3c047042f201bbd287e975360891ce95
Base APK: com.Sightreduction.apk
Split APKs: config.en, config.fr, config.mdpi
Size: 10.55 MB
What's New:
Upgraded to:
Android 16 - SDK 36
new Google Maps 'com.google.android.gms:play-services-maps:19.2.0'
Android 16 - SDK 36
new Google Maps 'com.google.android.gms:play-services-maps:19.2.0'
Android 5.0+
160-640dpi
27
May 1, 2025
Sight reduction
4.12
(27)
Requires Android: Android 5.0+
Screen DPI: 160-640dpi
SHA1: fc9575e09135c69b67d3aa047625bac69623c6e3
Base APK: com.Sightreduction.apk
Split APKs: config.ar, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.xxxhdpi, config.zh
Size: 5.36 MB
What's New:
Upgraded to:
Android 16 - SDK 36
new Google Maps 'com.google.android.gms:play-services-maps:19.2.0'
Android 16 - SDK 36
new Google Maps 'com.google.android.gms:play-services-maps:19.2.0'
Android 5.0+
160-640dpi
27
May 4, 2025
Sight reduction
4.12
(27)
Requires Android: Android 5.0+
Screen DPI: 160-640dpi
SHA1: 8bc56936f4a5d4b88a5173781eb8fcff6ecf66e3
Base APK: com.Sightreduction.apk
Split APKs: config.ar, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.xxhdpi, config.zh
Size: 5.36 MB
What's New:
Upgraded to:
Android 16 - SDK 36
new Google Maps 'com.google.android.gms:play-services-maps:19.2.0'
Android 16 - SDK 36
new Google Maps 'com.google.android.gms:play-services-maps:19.2.0'
Android 5.0+
160-640dpi
Variant
Arch
Version
DPI
26
July 29, 2024
Sight reduction
4.11
(26)
Requires Android: Android 5.0+
Screen DPI: 160-640dpi
SHA1: 8185cf066f99f7202c7ba8a0adaf247e93ca4530
Base APK: com.Sightreduction.apk
Split APKs: config.en, config.fr, config.mdpi
Size: 9.99 MB
What's New:
Upgraded to 'com.google.android.gms:play-services-maps:19.0.0'
Android 5.0+
160-640dpi
26
September 13, 2024
Sight reduction
4.11
(26)
Requires Android: Android 5.0+
Screen DPI: 160-640dpi
SHA1: 5e79a6a98a03ae8d427622c9dfbe6ad3ba1b95ec
Base APK: com.Sightreduction.apk
Split APKs: config.ar, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.xxhdpi, config.zh
Size: 5.27 MB
What's New:
Upgraded to 'com.google.android.gms:play-services-maps:19.0.0'
Android 5.0+
160-640dpi
26
September 21, 2024
Sight reduction
4.11
(26)
Requires Android: Android 5.0+
Screen DPI: 160-640dpi
SHA1: 52de586493fdfb64f0748a3f1f63940df63b37fe
Base APK: com.Sightreduction.apk
Split APKs: config.ar, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.xxxhdpi, config.zh
Size: 5.27 MB
What's New:
Upgraded to 'com.google.android.gms:play-services-maps:19.0.0'
Android 5.0+
160-640dpi
Variant
Arch
Version
DPI
25
January 3, 2024
Sight reduction
4.10
(25)
Requires Android: Android 4.4+
Screen DPI: 160-640dpi
SHA1: bf996864021536461596eddbe8597489a15bb600
Base APK: com.Sightreduction.apk
Split APKs: config.ar, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.xhdpi, config.zh
Size: 5.33 MB
What's New:
Updated to:
-play-services-maps:18.2.0
-android API 34
-play-services-maps:18.2.0
-android API 34
Android 4.4+
160-640dpi
25
January 4, 2024
Sight reduction
4.10
(25)
Requires Android: Android 4.4+
Screen DPI: 160-640dpi
SHA1: dfe328abc7f5d7ed3704c06d4efb6d7914e69509
Base APK: com.Sightreduction.apk
Split APKs: config.ar, config.de, config.en, config.es, config.fr, config.hi, config.in, config.it, config.ja, config.ko, config.my, config.pt, config.ru, config.th, config.tr, config.vi, config.xxhdpi, config.zh
Size: 5.34 MB
What's New:
Updated to:
-play-services-maps:18.2.0
-android API 34
-play-services-maps:18.2.0
-android API 34
Android 4.4+
160-640dpi
Requires Android: Android 4.4+
Screen DPI: 120-640dpi
SHA1: 7ded902259924acc6769ddcd34f8e740ba256e10
Size: 4.89 MB
More Information
Package Name:
Category:
Update Date:
2025-05-04
Latest Version:
4.12
Need Update:
Available on:
Requirements:
Android 5.0+
Report:
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