Outline

1. The tank and anechoic device
   

   Material:

   Ferro-concrete

   Tank demension:

   9m (length) × 9m (width) × 9m (depth)

   Anechoic device:

   Absorbers (Meyer rubber) attached to all sides and bottom (5 surfaces)
2. Transducer Position Determination Control Device
   For observations involving the sample, the sample position can be controlled and determined either automatically or manually. Information on the sample position is displayed in digital format.
   

   Item	Explanation
   Forward unit	Span: 9m
   	Speed control: 10cm/s (max)
   	Positioning precision: within±1cm
   Lateral unit	Lateral Span: 6m
   	Lateral speed: 1cm/s
   	Positioning precision: within±1cm
   Vertical unit	Mounting weight: 500Kg
   	Vertical motion range: 2m above water and 4.5m underwater
   	Vertical speed: 1cm/s
   	Positioning precision: within±5cm
   Rotation unit	Rotation angle: 370°clockwise, 370°counterclockwise
   	Rotation rate: 3°/s to 0.5°/s
   	Angular precision: within±0.5°

3. Underwater acoustic transducer automatic calibration device
   The items necessary for obtaining the capacity of the underwater acoustic transducer and other underwater acoustic instruments can be calibrated automatically
   

   Item	Explanation
   Items measured	Transducer voltage sensitivity,directional characteristic, and frequency characteristic
   Measured modes	Pulse waves or continuous waves
   Frequency range	Approximately 5kHz～250kHz