Sight reduction - Apps on AppQuesta

Sight reduction

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

Average Rating

3.7

Number of Ratings

123

Number of Downloads

10K+

Contains Ads

False

In-App Purchases

False

Install Fee

Free

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Maps & Navigation

About Sight reduction

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 ... read more

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User Reviews

joel buttle

Saturday, January 8, 2022

This app is useless for navigation because you can't specify the time at each sight. Would be very handy if there was a time perameter in the LOP box. Edited

Martin Leininger

Sunday, June 12, 2022

Does not appear to have instructions or nautical almanac.

A Google user

Wednesday, April 22, 2020

Works fine now

Navigational Algorithms
Wednesday, April 8, 2020

Permissions must be allowed Please check the new version. And please review your rating Thank you

A Google user

Monday, June 12, 2017

Great app, but I have two points to mention. 1) When I twist the smartphone (Samsung S-7) to horizontal all the previous LOPs disappear. So I have to re-enter all that data. Argh! 2) It's seemingly impossible to enter a negative IC (instrument correction). The work-around I use is to enter a negative value in some other APP and then copy/paste into the IC correction space. In conjunction with the Nautical Almanac app that I have this is a near perfect combination. I'm not giving up my GPS units, but it sure is nice to have some old-school stuff around as a back-up.

Navigational Algorithms
Friday, April 3, 2020

Please check the new version. And please review your rating, Thanks

A Google user

Wednesday, July 15, 2015

fix it please..

Navigational Algorithms
Tuesday, July 21, 2015

The app is OK. For the calculations, see: https://sites.google.com/site/navigationalalgorithms/papersnavigation/Ho.en.pdf An example: Sun LL, Sea Horizon Hs = 32º 30.9' ic = -0.8 ' heas = 2.5 m 10 ºC, 1010 hPa Hoi = 32.5017 º Ha = 32º 27.3' R = 0.0255 º OB = -0.00000335 º HP = 0.0024 º PA = 0.00202519 º SD = 0.2623 º Ho = 32º 41.7'

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