5.11's HRT watch is available in rugged titanium or classic brushed stainless steel. The watches are waterproof to 100 meters, include standard chronograph features and showcase the revolutionary SURESHOT ballistic calculator. 5.11 has teamed with Horus Vision, makers of proven long-range ballistic software, to bring their technology to your wrist. Input your known ballistic data (bore height, ballistic coefficient, muzzle velocity zero range), then add your environmental data (range, temperature,altitudeinclination) and the SURESHOT calculator will give you a shooting result in MILS, TMOA or SMOA. Other features of the watch include day, date, second time zone, alarm, chronograph (1/100th, lap time), countdown timer & hourly chime. Each watch has a uni-directional bezel to help mark your time and chargeable luminescent markings.