The Seakeeper 35 is designed to eliminate up to 95%
of boat roll on boats up to ~100 tons, vessels ~85 feet and larger.
Multiple units can be fitted for larger boats. Unlike
traditional external fins, the Seakeeper 35 requires only
modest electrical power, has no external appendages—
meaning no drag or risk of snags—and can be installed
virtually anywhere on board.
~ 23' - 30'
~ 30' - 36'
~ 35' - 41'
~ 38' - 44'
~ 40' - 46'
~ 42' - 48'
~ 44' - 52'
~ 50' - 59'
~ 60' - 75'
~ 70' - 85'
~ 85' +
| Weight | 3,920 lbs (1,778 kg) |
| Dimensions | 52.8 L x 55.9 W x 42.4 H (inches) |
| 1.342 L x 1.419 W x 1.076 H (meters) |
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.
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.
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.
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.
| Max Rated Speed | 5,150 RPM |
| Angular Momentum at Max Rated RPM | 35,000 N-M-S |
| Max Anti-rolling Torque at Max Rated RPM | 93,934 N-M |
| Spool-up Time to Max Rated RPM | 76 minutes (5,150 RPM) |
| Spool-up Time to Stabilization | 58 minutes (4,378 RPM) |
| Power Consumption | |
| Spool-Up Power | 5,000 Watts Max |
| Operating Power | 2,400 - 5,000 Watts (Sea State Dependent) |
| AC Power Input | 30 Amps @ 208 - 230 VAC
50/60 Hz, Single Phase |
| Control Power | 360 Watts |
| Control Power Input | 24 VDC @ 15 Amps Max |
| Seawater Pump Power Input Over Current Protection based on installed pump rating |
230 VAC @ 5 Amps Max |
| Weight | 3,920 lbs (1,778 kg) |
| Envelope Dimensions | 52.8 L x 55.9 W x 42.4 H (inches) 1.342 L x 1.419 W x 1.076 H (meters) |
| Noise Output | <74 dBC at 1 meter |
| Seawater Supply to Heat Exchanger | 10 GPM (38 LPM) minimum
14 GPM (53 LPM) maximum |
| Ambient Air Temperature | 32° - 140° F (0° - 60° C) |
To ensure peace of mind, all Seakeeper products come
with a multi-year factory warranty
If you are buying a new boat, please consult directly with the builder. If you already own a boat and are interested in a refit, please contact Seakeeper directly or consult with one of our Global Partners.
