URN measures underwater radiated noise from surface warship & submarine. It evaluates the noise level by ship speed, analyzes root cause and judges the phenomena of propellant cavitation and singing.

· Hydrophone: 6ch, -170dB · Tilt/Depth Sensor: Heading 0.1˚, Pitch/Roll 0.4˚, Depth 0 to 50 bar · Pinger: 30kHz, 72 hours operating · Buoy: Sampling up to 200kHz, LAN, FTP, USB as data backup · Other devices: GPS, RF/wifi Device, Flash light · Software analysis tool: Octave, FFT, Waterfall, Time & Power    Spectrum, LOFAR, DEMON

· Analysis & Evaluation system of radiated noise for surface    warship and submarine · Improvement of warship stealth design and shipbuilding    technology · The research for low noise vessel according to the marine    vessel noise regulation