Seakeeper 7000 Installation Manual page 8

DOCUMENT # 90020, REV 5 MODEL 7000 GYRO INSTALLATION MANUAL-MAR09
Gyro noise has been measured under steady state conditions (no wave load) in Seakeeper's
lab and in our 43 ft Viking test boat. The steady state noise is typically in the range of 70-75
dB unweighted. As the frequencies emitting the highest sound pressures are low (like other
marine machinery), it is recommended that the gyro be installed in a cage in a machinery
space that is already treated with soundproofing.
If the gyro stabilizer has to be located outside a machinery space, it should installed in a
soundproof enclosure to prevent low frequency noise (approximately 160 Hz) from
entering the living spaces. In this case, the enclosure can be open at the bottom between
the hull stringers. A small exhaust fan should be installed in the top of the enclosure pull
ambient air thru the enclosure so they air in the enclosure does not heat up.
Page 6 of 9