This is a great app. It makes astronavigation accessible to any one who wants to give it a try. You can even begin without a sextant. The corrections and calculations are handled behind the screen leaving a simple user interface. Put in the information on the form and it does the rest. Particularly. Handy is the "NOW" button to accurately grab the sight time. The app allows access to all the data allowing a deeper understanding when and if you are ready. I recommend this for both real navigation and as a great learning tool. The app has been updated to do all the calculations when practising at home using a bowl of water as an artificial horizon.
One of the best written Android apps out there. Highly useful. I am a former aircraft navigator who used a sextant professionally.
Latest version crashes on Nexus 7. Display is partially cut off. At least the earlier versions sorta worked. Don't waste your money on this mess.
After I "Quit" the App, it won't restart, just hangs with a green band across the top of an otherwise blank screen. If I Force Stop it in App Manager, it will then start and run normally.
Great tool if you want to use a sextant We use this app in teaching yachtmaster ocean course. It is very easy and accurate. It fills a gap between using the sextant accurately and position fix. It does the maths for you.
OK for the price Runs fine on my Acer A500 tablet. Used daily on voyage from Australia to China. Would be great if app had Lat / Long input from my tablets built in GPS.
+ Use moving average filter to limit altitude sensor variation.
GPS Route Finder help you to find easiest and fastest route for your destination