Mach Number is odd

The app is great. One concern though: it appears you are using the Mach conversion based in the speed of sound in water, which, as far as I know, isnt used too much since not many things travel near 1482 m/s in water. I would like to see a Mach conversion thats based on something relevant like 35,000 ft in the air or so on a standard day.

ThatHippie about Units Plus Converter