In total, thirty transducers were installed on-board the target
vessel measuring hull pressure pulses, engine and hull vibration,
ultrasonic underwater noise, airborne noise in the engine room,
engine power, propeller shaft speed and torque, together with a
boroscope and several cameras to carry out detailed propeller
cavitation observations. As well as providing detailed information
of on-board noise and vibration generated by propeller cavitation
and engines this also allowed records of the vessel operating conditions during each run to be made in addition to the ship’s own readouts.
In addition to the above, for each run a record was made of
wind speed, wave height, vessel speed over ground (SOG) and
speed through the water (STW), rudder angle and water depth
from visual observations and the vessel's own equipment