The telemetry portable deck unit powers and interfaces by coaxial oceanographic cables, the OCEAN SEVEN 3xx probes with a personal computer. The portable deck unit is equipped with a transceiver (modem) which allows half-duplex communication with the probe. The portable deck unit is housed in a waterproof plastic case and is provided with an internal mans rechargeable lead battery (12 VDC, 7 A/h) which permits probe operation even in the absence of the mains supply. The portable deck unit comes complete with an international battery charger: 115/220 VAC +/- 10%, 50-60 Hz +/- 5%. Telemetry power supply: 30 VDC (max 0.3 A @ 12V). Dimensions: 340 x 300 x 16 mm. Weight 6.5 Kg.