If the Scubapro FS2 Compass works half as good as it looks they are on to a winner. The interior compass module looks like something off a pirate ships compass binnacle. The whole FS2 compass module is rounded allowing a 30 degree angle tilt whilts still reading accurately.
With a luminous dial, side window and degree markers every 10 degrees, this compass is now a serious contender for best underwater compass.
It comes with a retractor so you can pull it out when needed and keep it close when not.