NRG Marine Sonihull Duo Ultrasonic Antifouling System, NRGSH2

After six months in a harbor where the neighboring vessel has seen 5 inches of green algea growth on every underwater surface, our 34 ft cat fireboat has no visible growth. It's as clean as the day it was put in Puget Sound. Speed remains at 40 knots, whereas prior to the Sonihull installation, six months of growth would slow us down to 33 knots. Worth it's weight in gold with fuel cost savings, semiannual haulouts, and out of service time. Thanks Sonihull.