Seakeeper 3

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!

$26,900 (not including installation) Buy Now
Seakeeper 3

Ideal for Boats

~ 30' - 39'

~ 40' - 49'

~ 50' - 59'

~ 60' - 69'

~ 70' - 84'

~ 85' +

Seakeeper 3 shown to scale here on a Contender 35 ST.

Stabilization for Small Boats

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

Simple installation, quiet operation, and no generator necessary

Take a Look Under the Hood

Weight 550 lbs (249 kg)
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)
View full spec sheet Seakeeper 3

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 3


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)

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.

Distrbutor IconCreated with Sketch. Installation Center IconCreated with Sketch. Seakeeper IconCreated with Sketch. Service Center IconCreated with Sketch. Service Installation ComboCreated with Sketch. angle-right3Asset 1boat-40-49boat-45-54boat-50-59boat-55-64boat-60-69boat-65-74 boat-70-84Asset 1boat-85+ Calendar IconCombined ShapeFacebookfacebook earthgoogle-plusinstagram linkedin Logo/Logomarkmail IconPhone IconAward IconLogo/SHD WhiteCreated with Sketch. Seakeeper LogomarkSmile IconInstallation IconTwittertwittervimeo youtube
View The
Seakeeper Brochure
Commercial (HD)