Seakeeper 18

Crafted for ~60-75 foot 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 on board.

$163,200 (not including installation)
Seakeeper 18

Ideal for Boats

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~ 23' - 30'

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~ 30' - 36'

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~ 35' - 41'

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~ 38' - 44'

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~ 40' - 46'

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~ 42' - 48'

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~ 44' - 52'

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~ 50' - 59'

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~ 60' - 75'

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~ 70' - 85'

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~ 85' +

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Seakeeper 18 shown to scale here on a 73' Absolute Navetta.

Stabilization for Any Occasion

Small & Lightweight

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

Eliminate Boat Roll

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

Flexible & Efficient

Unlike traditional fins, Seakeeper is completely internal and can be installed virtually anywhere

Take a Look Under the Hood

Weight 2,460 (1,116 kg)
Dimensions 42.5 L x 43.2 W x 33.6 H (inches)
1.078 L x 1.096 W x 0.854 H (meters)
View full spec sheet Seakeeper 18

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 in a vacuum, they are isolated from the marine environment.

Active Control

Seakeeper’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.

Intuitive Dash Display

Control your Seakeeper with the push of a button on our new user-friendly dash display. Not only is the display simple to use, but it integrates into your existing dash units for optimal performance.

Seakeeper 18


Max Rated Speed 6,150 RPM
Angular Momentum at Max Rated RPM 18,000 N-M-S
Max Anti-rolling Torque at Max Rated RPM 47,881 N-M
Spool-up Time to Max Rated RPM 42 minutes (6,150 RPM)
Spool-up Time to Stabilization 31 minutes (5,228 RPM)
Spool-up Power
Spool-Up Power 3,700 Watts Max
Operating Power 1,425 - 3,700 Watts (Sea State Dependent)
AC Power Input 30 Amps @ 208 - 230 VAC
50/60 Hz, Single Phase
Control Power 240 Watts
Control Power Input 24 VDC @ 10 Amps Max
Seawater Pump Power Input
Over Current Protection based on installed pump rating
24 VDC @ 10 Amps Max
Weight 2,460 lbs (1,116 kg)
Envelope Dimensions 42.5 L x 43.2 W x 33.6 H (inches)
1.078 L x 1.096 W x 0.854 H (meters)
Noise Output <68 dBC at 1 meter
Seawater Supply to Heat Exchanger 4 GPM (15.1 LPM) minimum
8 GPM (30.3 LPM) maximum
Ambient Air Temperature 32° - 140° F (0° - 60° C)

Seakeeper Warranty

To ensure peace of mind, all Seakeeper products come
with a multi-year factory warranty

View Warranty Details

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