Seakeeper 9

Seakeeper 9


An evolution of our original M7000, the Seakeeper 9 is the product that changed the boating experience forever! Specially designed to stabilize boats ~50’ - 59’, or up to ~30 tons.

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

Seakeaper’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.


Rated Speed9,000 RPM

Angular Momentum at Rated RPM9,000 N-M-S

Anti-Rolling Torque at Rated RPM18,810 N-M

Spool-up Time to Rated RPM55 minutes (9,000 RPM)

Spool-up Time to Stabilization38 minutes (7,650 RPM)

Spool-up Power

AC Motor3000 Watts Max

DC Control240 Watts

Operating Power

AC Motor (sea state dependent)1500 - 2000 Watts

DC Control240 Watts

AC Input Voltage208 - 230 VAC (+/- 10%), 50/60 Hz, Single Phase

DC Input Voltage24 VDC @ 10 Amps

Weight1,210 lbs (550 kg)

Envelope Dimensions33.5 L x 35.6 W x 28.3 H (inches) 
0.852 L x 0.903 W x 0.720 H (meters)

Noise Output68-70 dBC at 1 meter

Sea Water Supply to Heat Exchanger30 LPM (8 GPM) maximum
15 LPM (4 GPM) minimum

Ambient Air Temperature0°-60° C (32° - 140° F)


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