The OceanTRx 4MIL Ka from Orbit Communication Systems is a Space-Qualified Satellite Terminal with a Ka-band transmit frequency range of 29-31.0 GHz and a receive frequency range of 19.2-21.2 GHz. This VSAT system has a RHCP/LHCP Electrically switchable polarisation control and a system G/T of 20.3 dB/Deg K. It uses a dual offset Gregorian antenna that measures 1.15 m. The terminal has a continuous azimuth range and an elevation range of -30 to +120 degrees. It features simultaneous operation or automatic switching of dual and multiple bands and incorporates a patented algorithm that enables seamless MEO/LEO satellite handover. The terminal is designed and tested for the strictest MIL-STD-810G environmental conditions and MIL-STD-461G EMI/EMC conditions. It weighs less than 250 Kg and measures 1.55 × 1.69 m (radome size). The terminal is has an optional fast manual band swapping with multiple BUCs per system and provides reliable, high-capacity, long-range multiband communication to navy vessels under extreme conditions.