Celestial Navigation 4+
Sextant Sight Reduction
Dr. Harald Merkel
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- £1.99
Screenshots
Description
This app does all the calculations to reduce a sextant reading to a line of position on the map. All intermediate numbers are shown to check your manual calculations.
• Perpetual nautical almanac
• Calculation of the line of position (azimuth and distance)
• Draws the line of position on the map.
• Star Finder: just point your device to the sky to identify the navigational stars.
• Save your readings, choose what to show on the map.
A sextant is required to make full use of this app.
What’s New
Version 1.4
• Supports now dark modus.
• Alphabetical star list as option.
• Bug fixes, e.g. fixed missing possibility to enter negative index error on some devices.
Ratings and Reviews
Bug with iPad when using star finder .
Great app but the star finder displays stars for a second then goes blank on my iPad .
Good for teaching yourself
This app is fantastic if you’re trying to teach yourself celestial navigation with no help. It allows you to check your working and see where you have made mistakes if you’re trying to get good at using tables or a calculator. You can use it to make up sights for you to reduce when you can’t see any celestial bodies, or to practice reducing sights in different locations. The only problem I’ve found is if you convert E longitude into W longitude (>180°W) it crashes the app if you try to use the map function.
Inexpensive
This is the first CelNav non-free app I have tried. Seems good value for money, I reproduced some sightings from 2018 with success. Be careful with the Index error: to add to the Sextant Altitude a positive quantity you must enter a negative quantity for Index Error!
App Privacy
The developer, Dr. Harald Merkel, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.
No Details Provided
The developer will be required to provide privacy details when they submit their next app update.
Information
- Provider
- Dr. Harald Merkel
- Size
- 53.6 MB
- Category
- Navigation
- Compatibility
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- iPhone
- Requires iOS 11.0 or later.
- iPad
- Requires iPadOS 11.0 or later.
- iPod touch
- Requires iOS 11.0 or later.
- Apple Vision
- Requires visionOS 1.0 or later.
- Languages
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English, German
- Age Rating
- 4+
- Copyright
- © 2019 Dr. Harald Merkel
- Price
- £1.99
Supports
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Family Sharing
Up to six family members can use this app with Family Sharing enabled.