Specifications include, but are not limited to: The following minimum specifications shall ensure that the side scan sonar systems perform the tasks necessary to satisfy USM’s project’s objectives. A. Towbodies for integrated sonar systems (1) and (2) Construction Electro-polished marine grade 316 Stainless Steel Length No greater that 1.5 m Outer Diameter No greater than 10 cm Weight in air no greater that 75 lbs Operating temperatures -10 to 370 C Storage temperature -200 to 600 C The operating voltage 12 VDC or 110/120 VAC Output data format SDF and XTF Depth/ pressure sensors 300 m / 450 psi Water temperature sensor 0-350 C Built in Altimeter 360 kHz 0 to 100 m range Other sensors Built-In Heading, Pitch and Roll Sensors B. Integrated Sidescan Sonar System (1) Transducers Simultaneously dual mode single beam transducers Frequency range 300 kHz and 600 kHz Signal type FM Chirp The horizontal beamwidth at 300 kHz Equal or less than 0.60 The horizontal beamwidth at 600 kHz Equal or less than 0.40 The vertical beam width No greater than 500 The vertical beam center At least 140 down from the horizontal at both frequencies The maximum transmission range at 300 kHz At least 225 m The maximum transmission range at 600 kHz At least 100 m The operational tow speeds and scan ranges to maintain 1m object detection 100 m at 4 knots, 7 m at 4.5 knots, 50 m at 7 knots Across track resolution at 300 kHz At least 2.6 cm Across track resolution at 600 kHz At least 2.5 cm Maximum operating depth At least 1500 m Motion tolerant transducer design Transducer array designed to mitigate motion.
