Seakeeper 7 HD

Designed to eliminate up to 95% of boat roll on ~45’ - 54’ vessels,
up to ~25 tons, the Seakeeper 7HD is completely internal,
requires only modest electrical power, and can be installed
virtually anywhere on board.

$73,100 (not including installation) Buy Now
Seakeeper 7 HD

Ideal for Boats

~ 45' - 54'

~ 55' - 64'

~ 65' - 74'

~ 75' +

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

$22,700(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 6

Seakeeper 6

$42,200(not including installation)
For Boats ~ 40' - 49' Weight: 870 lbs (395 kg) Learn More
Seakeeper 9

Seakeeper 9

$73,100(not including installation)
For Boats ~ 50' - 59' Weight: 1,210 lbs (550 kg) Learn More
Seakeeper 16

Seakeeper 16

$99,400(not including installation)
For Boats ~ 60' - 69' Weight: 2,195 lbs (996 kg) Learn More
Seakeeper 26

Seakeeper 26

$161,800(not including installation)
For Boats ~ 70' - 84' Weight: 2,960 lbs (1342 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 7 HD shown to scale here on a 50' Pilot Boat.

Proceed with Confidence

Durability

Designed for longer, rougher use. Seakeeper HD will keep you stable and safe, no matter how long the job

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

Take a Look Under the Hood

Weight 1,210 lbs (550 kg)
Dimensions 33.5 L x 35.6 W x 28.3 H (inches)
0.852 L x 0.903 W x 0.720 H (meters)
View full spec sheet Seakeeper 7 HD

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 7 HD

Specifications

Rated Speed 7,000 RPM
Angular Momentum at Rated RPM 7,000 N-M-S
Anti-Rolling Torque at Rated RPM 14,630 N-M
Spool-up Time to Rated RPM 35 minutes (7,000 RPM)
Spool-up Time to Stabilization 25 minutes (5,600 RPM)
Spool-up Power
AC Motor 3000 Watts Max
DC Control 240 Watts
Operating Power
AC Motor (sea state dependent) 1000 - 2000 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 1,210 lbs (550 kg)
Envelope Dimensions 33.5 L x 35.6 W x 28.3 H (inches)
0.852 L x 0.903 W x 0.720 H (meters)
Noise Output 68-70 dBC at 1 meter

Seakeeper Warranty

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

View Warranty Details
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Seakeeper Brochure
Recreational
Commercial (HD)