Joe is correct! My inexpensive mono scope is waterproof and floats. It is even yellow unlike many waterproof gadgets. It cost me under $150.00 and that may not sound like inexpensive but if you have ever had to dive to untangle a lobster pot warp at night, in windy conditions, alone it is a bargain! ...
With such a ringing endorsement, please clue us in to the make and model!