Seakeeper 35

The Seakeeper 35 is designed to eliminate up to 95%
of boat roll on boats up to ~100 tons, vessels ~85' 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.

$210,000 (not including installation) Buy Now
Seakeeper 35

Ideal for Boats

~ 30' - 39'

~ 40' - 49'

~ 50' - 59'

~ 60' - 69'

~ 70' - 84'

~ 85' +

Seakeeper 35 shown to scale here on a Dominator 29M Avantgarde.

Completely Internal Stabilization

Small & Lightweight

Seakeeper weighs only a small fraction of the boat's displacement

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

Sea Trials

See for Yourself How Seakeeper
Transforms Your Experience on the Water

See All
Canados Oceanic 90

Take a Look Under the Hood

Weight 3,920 lbs (1,778 kg)
Dimensions 54.3 L x 55.9 W x 43.5 H (inches)
1.38 L x 1.42 W x 1.11 H (meters)
View full spec sheet Seakeeper 35

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.

Seakeeper 35

Specifications

Rated Speed 5,150 RPM
Angular Momentum at Rated RPM 35,000 N-M-S
Anti-Rolling Torque at Rated RPM 73,000 N-M
Spool-up Time to Rated RPM 65 minutes (5,150 RPM)
Spool-up Time to Stabilization 45 minutes (4,380 RPM)
Spool-up Power
AC Motor 5000 Watts Max
DC Control 240 Watts
Operating Power
AC Motor (sea state dependent) 2000 - 5000 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 3,920 lbs (1,778 kg)
Envelope Dimensions 54.3 L x 55.9 W x 43.5 H (inches)
1.38 L x 1.42 W x 1.11 H (meters)
Noise Output 72-74 dBC at 1 meter
Sea Water Supply to Heat Exchanger 53.0 LPM (14 GPM) maximum
38.0 LPM (10 GPM) minimum
Ambient Air Temperature 0° - 60° C (32° - 140° F)

How to Buy

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.

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Seakeeper Brochure
Recreational
Commercial (HD)