The Tusa Platina Compass is liquid filled for a smooth, fast reacting compass heading. Compass is equipped with both top and side scan reading for gun sight accuracy. The ratcheted rotating bezel has compass headings in 30° degrees numbered increments and indicator marks for every 10° degrees. Bezel has twin heading indicators for alignment of compass course, and a lubber line across the compass face. Tusa is the first company in the world to incorporate Lumi-Nova light storage dials. This groundbreaking innovation offers several times the brightness of conventional dials, as well as longer luminescence times. The entire face glows bright enough to make it ideal for night diving or diving in dark areas but contains no radioactive materials. Gauge come in a Durable Impact Resistant Rubber Wrist Boot and is covered by a 12 month limited warranty.