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  1. Atomic 4 Shakes the Boat

    General Discussion (sailing related)
    I purchased a Cat27 last summer and am hooked. She has an Atomic 4 that runs like a horse. Last weekend as i was headed back into port (under power at top speed) the boat suddenly lost a lot of speed and the motor got loud, the boat also started to shake. I throttled back on the gas and ran...
  2. speed vs wind

    Cruising & Liveaboard Forum
    I am new to sailing- can a sailboat travel faster than the wind? Hypothetically, if the hull speed is 7kn and the winds are only 4kn can the boat go 5 or 6 kn?
  3. How do you measure the waterline

    General Discussion (sailing related)
    How do you measure the waterline on a sailboat? I want to calculate the approximate best speed of my sailboat. Do I measure the curve of the boat or just a straight line from the bow to the stern on the waterline?
  4. Hydroptere - World Record 51 kts

    Extreme Sailing Videos
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