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 ~36’ – 39’ boats. Refits have never been easier than with the Seakeeper 3’s leaning post installation option!

Technical specifications

Max Rated Speed	8,450 RPM
Angular Momentum at Max Rated RPM	3,000 N-M-S
Max Anti-Rolling Torque at Max Rated RPM	7,854 N-M
Spool-up Time to Max Rated RPM	50 minutes (8,450 RPM)
Spool-up Time to Stabilization	36 minutes (7,185 RPM)
Power Consumption
Spool-Up Power	900 Watts Max
Spool-Up Power Input	12 VDC @ 85 Amps
Operating Power	400 – 750 Watts (Sea State Dependent)
Operating Power Input	12 VDC @ 33-62 Amps
Control Power	125 Watts
Control Power Input	12 VDC @ 10 Amps
Seawater Pump Power Input Over Current Protection based on installed pump rating	12 VDC @ 15 Amps Max
Weight	550 lbs (249 kg)
Envelope Dimensions	26.8 L x 27.0 W x 23.3 H (inches) 0.680 L x 0.685 W x 0.592 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)

Drawings

Frequently asked questions

What is a Seakeeper and what does it do?

It is a computer controlled gyroscope that eliminates most boat roll, including the fatigue, anxiety and seasickness that goes with it. Because of this game changing effect, PR Nautica have successfuly installed over 30 Seakeeper units worldwide.

How much does the Seakeeper weight, and what are the power and space requirements?

Typically, the Seakeeper weighs between 2 and 4% of boat weight, requires half or less the power of air conditioning, and fits in available space down in the after part of the hull. Nothing extends outside the hull and the Seakeeper is a small percentage of the overall volume of the boat.

Is there a Seakeeper suitable for my boat?

Seakeepers are sutiable for most boats 30 feet and above. PR Nautica can install the best option on new vessels and as a retro project. Up to 20 tons, vessels 30-50′: Seakeeper 5 Up to 35 tons, vessels 50-65′: Seakeeper 9 Up to 70 tons, vessels 65-80′ : Seakeeper 16 Up to 100 tons, vessels 80-100′: Seakeeper 26 Greater than 100 tons, vessels >100′: Seakeeper 35

I have an existing boat, can a Seakeeper be installed after build?

Yes, we can fit Seakeepers to both new vessels and aftermarket. The time of a retrofit installtion will vary depending on the Seakeeper and the model of the vessel. Typical installation time is 1-3 weeks. Get in touch for a custom quotation.