B.U.D Back-Up Device
Set it and forget it.
The B.U.D. is a long overdue idea and a great way to ensure that you never have to miss a dive.
Clip it off or stow it in a pocket and forget about it. B.U.D. is a universal backup dive computer that uses Dual Algorithm technology allowing you to adust your dive computer's settings to closely match just about any other dive computer on the market making it the perfect backup device.
You should never have to use it, but if you do need it, your B.U.D. will be there to save your next dive.