Sailing Zephyr IV · video

What this video covers

Dave installed an ultrasonic antifouling system on Zephyr IV to test its effectiveness over a full sailing season.Watch Throughout the year, the hull remained largely free of hard growth, though a light, jelly-like film accumulated during periods of inactivity.0:23 After four months on a mooring, the hull appeared fuzzy, but a short harbor run at 2000 engine RPM increased speed from 3.1 to 4 knots as the growth washed away.5:19 Inspection after a haul-out confirmed the coating was easily wiped off, and no barnacles were present on the hull.6:41 The system consumes approximately 7 watts, or 0.5 amps on a 12-volt system, and includes a low-voltage cutoff to protect batteries.8:04 While the ultrasonic unit does not replace traditional ablative antifouling paint, it eliminates the need for mid-season scrubs and extends the lifespan of the paint.7:49

Boats in this video

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