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!

$27,700 (not including installation) Buy Now
Seakeeper 3

Ideal for Boats

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~ 27' - 32'

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~ 33' - 39'

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~ 40' - 45'

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~ 46' - 52'

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~ 50' - 59'

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~ 60' - 69'

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~ 70' - 84'

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~ 85' +

Size does matter

Which Seakeeper is right for your boat?

This guide will help select the model that will offer optimal performance for 27 - 49' cruisers and center consoles. We aim to eliminate up to 95% of boat roll, and that starts with choosing the appropriate Seakeeper for your boat. For product recommendations on sportfish, commercial, or larger vessels, please Contact Us for a custom performance prediction. Check out our sea trial library to view performance results on similar boat types!

Select Boat Type

Don't see your boat type? Contact Seakeeper for a customized sizing.

Select Boat Length

Please round up to the nearest whole foot.

Select Beam Length

Please round up to the nearest whole foot.

Seakeeper 2

Seakeeper 2

$19,900(not including installation)
For Boats ~ 27' - 32' Weight: 414 lbs (188 kg) Learn More
Seakeeper 3

Seakeeper 3

$27,700(not including installation)
For Boats ~ 33' - 39' Weight: 550 lbs (249 kg) Learn More
Seakeeper 5

Seakeeper 5

$38,900(not including installation)
For Boats ~ 40' - 45' Weight: 870 lbs (395 kg) Learn More
Seakeeper 6

Seakeeper 6

$45,900(not including installation)
For Boats ~ 46' - 52' Weight: 870 lbs (395 kg) Learn More
Seakeeper 9

Seakeeper 9

$77,900(not including installation)
For Boats ~ 50' - 59' Weight: 1,210 lbs (550 kg) Learn More
Seakeeper 16

Seakeeper 16

$109,900(not including installation)
For Boats ~ 60' - 69' Weight: 2,195 lbs (996 kg) Learn More
Seakeeper 26

Seakeeper 26

$166,900(not including installation)
For Boats ~ 70' - 84' Weight: 3,010 lbs (1365 kg) Learn More
Seakeeper 35

Seakeeper 35

$216,300(not including installation)
For Boats ~ 85' + Weight: 3,920 lbs (1,778 kg) Learn More

The Seakeeper can be installed anywhere in the boat from amidships aft, as long as access is provided for routine maintenance. Our Seakeeper Dealer network can help determine the best location and installation plan for each individual boat.

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.

New Dash Display

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.

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)

Seakeeper Warranty

To ensure peace of mind, all Seakeeper products come
with a multi-year factory warranty

View Warranty Details

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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