SIERA (SC-SDA14)PORTABLE UNDERWATER CALIBRATION SYSTEM Description SIERA offers a solution for the characterization and calibration of underwater acoustic systems (hull-mounted sonars, dipping sonars, variable depth sonars, buoys...). SIERA also allows radiated noise measurements in the far field. SIERA is an autonomous system towed from a dedicated boat. SIERA is composed of 4 subsets : • a processing and visualizing unit • a light towed body • two winches for towline storage • two 250 m electrical cables equipped with waterproof plugs and associated extension cables Products are subject to export control restrictions. Applications • Sea Acceptance Tests • Transmission level measurements • Calibrated sound-effects engineering for training in an operational environment • Radiated noise measurements in the far field Features • Frequency and level measurement • Noise maker • Repeater • Answerer • GPS positioning • Visualization of received and emitted signals • Immersion measurement of towed body • Towed body size: D: 205 mm L: 1312 mm • Towed body weight: 19 kg • Max operating depth: 500 m • Max towing speed: 10 kn CharacteristicsPowered bvSDA • Reception sensibility: sea state 0 up to 180 dB/pPa • Emission level: 185 dB from 3 to 20 kHz, 150 to 185 dB from 200 Hz to 3 kHz • Frequency band (E/R): 200 Hz to 20 kHz • Measures in ref: dB/pPa related at 1 m RTSYS - Underwater Acoustics & Drones +33(0)297 898 580 -

SIERA (SC-SDA14) Towed body • Welded and screwed mechanical parts in 316 L • stainless steel • B&K 8106 Hydrophone • Neptune Sonar D/11/BB Transducer • Watertight enclosure: o 3 waterproof plugs o Pressure sensor o Protecting and filtering electronics • Removable storage plug Two 250 m towed electrical cables equipped with two waterproof connecting sockets. Two aluminum winches equipped with a retractable handle, a locking system and mounting brackets on the deck. Acquisition and CAG generation box The acquisition and CAG generation box is composed of the following elements: • 19-inch 6U enclosure...