This is the Scubapro FS-1.5 Dive Compass cpl Scuba Diving Wrist Compass Features: Easy to read, and easy to use. Mounted in a pressure-resistant oil-filled polycarbonate housing. This version is calibrated to the Northern hemisphere. A compact and durable instrument for precise underwater navigation. Mounted in a pressure-resistant oil-filled polycarbonate housing, this compass is easy to read and easy to use. Calibrated to the Northern hemisphere.