Seakeeper 40 | Blue Seas Stabilizer

The Seakeeper 40 is designed to eliminate up to 95% of boat roll on boats 85 feet and up (up to 115 tons) and now features field replaceable bearings (FRB). Engineered from the previous Seakeeper 35 model, we've improved performance without sacrificing power, space, or weight. Multiple units can be fitted for larger boats.

MSRP $348,800

Ideal for Boats

Seakeeper 40 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

Take a Look Under the Hood

Weight	4,074 lbs (1,848 kg)
Dimensions	54.3 L x 55.9 W x 40.6 H (inches)
	1.38 L x 1.42 W x 1.04 H (meters)

View full spec sheet

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 in a vacuum, they are isolated from the marine environment.

Active Control

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.

Intuitive 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 18

Max Rated Speed	5,150 RPM
Angular Momentum at Max Rated RPM	40,000 N-M-S
Anti-Rolling Torque at Max Rated RPM	104,720 N-M
Spool-up Time to Max Rated RPM	70 minutes (5,150 RPM)
Spool-up Time to Stabilization	40 minutes (3,863 RPM)
Spool-up Power
Spool-Up Power	5000 Watts
Operating Power	1,900 – 4,400 Watts
Operating Power Input	208-230 VAC @ 30 Amps, 50/60 Hz
Control Power	240 Watts Max
Control Power Input	24 VDC @ 15 Amps Max
Seawater Pump Power Input	24 VDC @ 20 Amps Max
Sea Water Supply to Heat Exchanger	13 GPM (49 LPM) Minimum 15 GPM (57 LPM) Maximum
Weight	4,074 lb (1,848 kg)
Envelope Dimensions	54.3 L x 55.9 W x 40.6 H (inches) 1.38 L x 1.42 W x 1.04 H (meters)
Noise Output	<73 dBC @ 3.3 feet (1 meter)
Ambient Air Temperature	32F – 140F (0C – 60C)