| デベロッパー: | Helmut Hoffrichter (3) | ||
| 価格: | $8.99 | ||
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| ポイント: | 3 + 1 (2.0) ¡ | ||
| App Store | |||
説明
So, the app can be used by anyone without any knowledge of celestial navigation. The sun cannot be confused with any other star and is available all day. Navigating with stars requires specialist knowledge so that stars can be reliably identified. At night the height of stars cannot be measured because the horizon is not visible.
With this app it is now possible to have a real second independent navigation system on board that anyone can use immediately, even in stressful situations and without prior instruction. Celestial navigation is a demonstrably a valid and safe navigation method. Sailors should always be able to master and use classic celestial navigation.
A failure of satellite navigation is difficult to imagine, but not impossible. A lot of money is spent each year on buying and maintaining yacht safety equipment in case of rare incidents that normally do not happen, but very little is done or available in the event of satellite navigation failure.
This app makes it very easy to meet the requirements for navigational safety of the ship and crew. It is professional system and makes it possible to check the functionality of the on board satellite navigation electronics with a totally independent system. For some sailors, classic celestial navigation is even a passion, finding the way only with the help of the heavens. After all, sailing itself is a historical form of travel.
The app based on the ideas of the renowned German mathematician Carl Friedrich Gauss in 1809. His solution was way ahead of its time. A position is calculated from the heights of two celestial bodies, or the sun at two different times and entered on a nautical chart. Satellite navigation works similar way.
Since there were no computers at that time sailors invented graphical approximation methods and only these methods are in use to this day. They are extremely complex and time-consuming and require a high level of knowledge of mathematics. In our modern times this greatly reduces the general appeal of celestial navigation as a backup system for safety at sea.
Compared to the commonly known graphical Marcq St. Hilaire method this app offers considerable advantages:
1. 1.There are no errors when measuring heights above 70 degrees.
2. 2.The time between two observations of the sun can be much shorter.
3. 3.To calculate a position, no DR-Position is necessary.
4. 4.The calculation algorithm is precise and is not an approximation.
The app includes the following functions:
1. 1.Automatically altitude corrections of sextant readings.
2. 2.An additional use of the noon latitude is possible.
3. 3.Module for dead reckoning with track recording.
4. 4.Map-download-function.
5. 5.Zoom function from the whole Earth down to the yacht harbor.
6. 6.Distance measurement from the ship's position to a destination.
7. 7.Representation of circles of position on the globe.
8. 8.Navigation simulator beside to an ongoing navigation.
9. 9.Sun almanac until 31. December 2040 in a data base.
10. 10.Detailed description in a help file.
Never before has it been so easy to navigate with the sun. No mathematics, no drawing and no searching in complicated tables. With this app celestial navigation becomes fun instead of arduous. Even if the accuracy of astronavigation takes getting used to at first, with this app and a cheap plastic sextant you are safer on the sea.
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