Sight reduction
Free App
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About Sight reduction
Celestial navigation - Astronavigation
Sight reduction:
- Marcq Saint Hilaire Line of Position, intercept method (p=Ho-Hc, Zn)
- Observed altitude Ho by nautical almanac data
- Local hour angle (LHA)
- Plot of the LoP on Google maps
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
Sight reduction:
- Marcq Saint Hilaire Line of Position, intercept method (p=Ho-Hc, Zn)
- Observed altitude Ho by nautical almanac data
- Local hour angle (LHA)
- Plot of the LoP on Google maps
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
All Application Badges
Free
downl.
downl.
Android
4.0+
4.0+
Android app
App History & Updates
What's Changed
- Plot of the Line of Position on Google maps
- Plot of the Line of Position on Google maps
More downloads Sight reduction reached 10 000 - 50 000 downloads
Version update Sight reduction was updated to version 2.9
Version update Sight reduction was updated to version 2.5
More downloads Sight reduction reached 5 000 - 10 000 downloads
What are users saying about Sight reduction
S
by S####:
by S####:
Very Helpful! Thanks
Q
by Q####:
by Q####:
Bravo
Q
by Q####:
by Q####:
Looks great on the surface.... No place to enter the time of the sight. Really Lame. DON'T BOTHER
I
by I####:
by I####:
fix it please..
L
by L####:
by L####:
Very Helpful! Thanks
Z
by Z####:
by Z####:
Great!!! Save a lot of time and a lot effort for a bunch of paper works required now a days on a merchant shipping... Thanks.
T
by T####:
by T####:
Ideal for saving time plotting a fix or simply checking your work. Recommend using the developer's almanac app alongside this one. Thanks!
T
by T####:
by T####:
Can be used to yuor good correction..wow
T
by T####:
by T####:
Very useful apps. Thanks
by M####:
Piece of junk. Does not work on Galaxy 6 or 7