Seakeeper 3

Seakeeper 3

Regular price $27,700.00 Sale

They say great things come in small packages and we set out to prove it. The Seakeeper 3 is our biggest smallest thing yet, specially designed to eliminate roll on ~30’ - 39’ boats. Refits have never been easier than with the Seakeeper 3’s leaning post installation option!

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 8,450 RPM
Angular Momentum at Rated RPM 3,000 N-M-S
Max Anti-Rolling Torque at Rated RPM 7,854 N-M
Spool-up Time to Rated RPM 50 minutes (8,450 RPM)
Spool-up Time to Stabilization 36 minutes (7,185 RPM)
DC Input Voltage 12 VDC @ 85 Amps
Spool-up Power
DC 900 Watts Max
Operating Power
DC 400 - 750 Watts (Sea State Dependent)
Weight 550 lbs (249 kg)
Envelope Dimensions 26.8 L x 27.0 W x 22.5 H (inches) 
0.681 L x 0.686 W x 0.572 H (meters)
Noise Output <72 dBC at 1 meter
Sea Water Supply to Heat Exchanger 2 - 6 Gal/Min.
Ambient Air Temperature 0 - 60 Deg. C (32 - 122 Deg. F)