I have the Casio Protrek Compass Watch,
This watch i recommend, and is very accurate whilst flying any unpressurised aircraft and from my experience whilst flying a piper warrior 161 is very accurate to that on the
altimeter, it also gives
direction, barometric pressure and temperature readouts.
You can buy it from the Flightstore pilot shop! They also sell this in argos!!
Heres the links:
http://www.flightstore.co.uk/prod/PROTREK/Brands/casio/
http://www.argos.co.uk/static/Produc...IO+PROTREK.htm
regards