Seakeeper 7HD

Designed to eliminate up to 95% of boat roll on ~45’ - 54’ vessels,
up to ~25 tons, the Seakeeper 7HD is completely internal,
requires only modest electrical power, and can be installed
virtually anywhere on board.

$89,400 (not including installation)
Seakeeper 7HD

Ideal for Boats

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~ 45' - 54'

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~ 55' - 64'

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~ 65' - 74'

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~ 75' +

Seakeeper 7HD shown to scale here on a 50' Pilot Boat.

Proceed with Confidence


Designed for longer, rougher use. Seakeeper HD will keep you stable and safe, no matter how long the job

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 1,210 lbs (550 kg)
Dimensions 33.5 L x 35.6 W x 27.9 H (inches)
0.852 L x 0.903 W x 0.708 H (meters)
View full spec sheet Seakeeper 7HD

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.

New 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 7HD


Max Rated Speed 7,000 RPM
Angular Momentum at Max Rated RPM 7,000 N-M-S
Anti-Rolling Torque at Max Rated RPM 14,630 N-M
Spool-up Time to Max Rated RPM 30 minutes (7,000 RPM)
Spool-up Time to Stabilization 23 minutes (5,950 RPM)
Power Consumption
Spool-Up Power 3000 Watts Max
Operating Power 1000 - 2000 Watts (Sea State Dependent)
AC Power Input 220 VAC, 50/60 Hz
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
Weight 1,210 lbs (550 kg)
Envelope Dimensions 33.5 L x 35.6 W x 27.9 H (inches)
0.852 L x 0.903 W x 0.708 H (meters)
Noise Output 68-70 dBC at 1 meter

Seakeeper Warranty

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

View Warranty Details

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Seakeeper Brochure
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Seakeeper Brochure
Commercial (HD)