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Crafted for 65’-75’ boats, up to 56 tons, the Seakeeper 18 is designed to eliminate up to 95% of boat roll. The Seakeeper 18 is completely internal, requires only modest electrical power, and can be installed virtually anywhere onboard.


IDEAL FOR BOATS:  ~65' - 75'



Eliminate up to 95% of boat roll and the danger, fatigue, anxiety, and seasickness that go with it.



Seakeeper weighs only a small fraction of the boat's displacement.



Unlike traditional fins, Seakeeper is completely internal and can be installed virtually anywhere. Regardless of where Seakeeper is installed, either on or off centerline, performance will remain the same. That’s because it’s attached to the structure of the vessel and will distribute the same forces throughout the hull.



Innovative Cooling System

Our patented cooling system allows the flywheel to spin at an extremely high rate of speed, providing ultimate performance in the smallest and lightest package possible.


Vacuum Sealed

Seakeeper’s vacuum encapsulation enables the flywheel to spin roughly three times faster, cuts flywheel weight by two-thirds and halves power requirements. Moreover, because the critical components (flywheel, bearings, and motor) are sealed for life in a vacuum, they are forever isolated from the marine environment.


Active Control

Seakepeeper’s active control optimizes gyro torque, providing an unsurpassed level of performance. Unlike a passively controlled gyro, which must be turned off in the roughest conditions and/or at higher speeds, the Seakeeper is effective at all speeds and can be used in all sea conditions.



EXTENDED WARRANTY options to suit your needs!



NOTEPrice does not include installation. Call us for an installation estimate at 503-735-0569.


Seakeeper 18 Boat Stabilizer

  • Max Rated Speed 7,000 RPM
    Angular Momentum at Max Rated RPM 18,000 N-M-S
    Max Anti-Rolling Torque at Max Rated RPM 34,980 N-M
    Spool-up Time to Max Rated RPM 50 minutes (7,000 RPM)
    Spool-up Time to Stabilization 35 minutes (5,950 RPM)
    Spool-up Power
    Spool-Up Power 3700 Watts Max
    Operating Power 2300 - 3700 Watts (Sea State Dependent)
    AC Power Input 220 VAC, 50/60 Hz, Single Phase
    Control Power 240 Watts
    Control Power Input 24 VDC @ 10 Amps
    Seawater Pump Power Input
    Over Current Protection based on installed pump rating
    24 VDC @ 10 Amps Max
    Sea Water Supply to Heat Exchanger 30 LPM (8 GPM) Maximum
      15 LPM (4 GPM) Minimum
    Ambient Air Temperature 0° - 60° C (32° - 140° F)
    Weight (Approximate) 2,270 (1,030 kg)
    Envelope Dimensions 42.1 L x 43.1 W x 33.6 H (Inches)
    1.069 L x 1.096 W x 0.854 H (Meters)
    Noise Output 66 - 68 dBC at 1 meter
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