Seakeeper 9

Seakeeper 9

Regular price $73,100.00 Sale

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

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.


Rated Speed 9,000 RPM
Angular Momentum at Rated RPM 9,000 N-M-S
Anti-Rolling Torque at Rated RPM 18,810 N-M
Spool-up Time to Rated RPM 55 minutes (9,000 RPM)
Spool-up Time to Stabilization 38 minutes (7,650 RPM)
Spool-up Power
AC Motor 3000 Watts Max
DC Control 240 Watts
Operating Power
AC Motor (sea state dependent) 1500 - 2000 Watts
DC Control 240 Watts
AC Input Voltage 208 - 230 VAC (+/- 10%), 50/60 Hz, Single Phase
DC Input Voltage 24 VDC @ 10 Amps
Weight 1,210 lbs (550 kg)
Envelope Dimensions 33.5 L x 35.6 W x 28.3 H (inches) 
0.852 L x 0.903 W x 0.720 H (meters)
Noise Output 68-70 dBC at 1 meter
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)