October 28, 2025

Answering the Cat Call: Seakeeper and Seakeeper Ride Release Sizing for Catamarans

At rest and underway stabilization now supported on power catamarans up to ~55 ft. (16 m)

LEESPORT, Pa. (October 28, 2025) – Seakeeper, Inc., the leader in marine motion control, is attending to the growing segment of catamarans by offering Seakeeper and Seakeeper Ride sizing and software specific to these unique hull styles.

While Catamarans offer some advantages, these boats are still susceptible to wave action and their unique hull designs can present several trade-offs such as flatter turns, increased yaw or bow steering, and porpoising motions at high speeds.

“With more than 1,000 catamarans built each year, customers are asking for stabilization, and Seakeeper is delivering,” said Seakeeper President and CEO Andrew Semprevivo. “We don’t do anything halfway, so we waited to focus on catamarans to provide them with the attention they deserved, and I know from experience that the performance improvements on these platforms are transformational.”

SEAKEEPER RIDE

Seakeeper Ride utilizes proprietary variable gain algorithms to optimize its performance on boats of all types and in all sea conditions without special tuning or calibration by the operator. While its current software will provide impressive underway pitch, roll, and yaw stabilization on catamarans today, early next year Seakeeper will introduce custom software specifically optimized for catamarans’ unique performance characteristics. The software provides enhanced underway stabilization and enables catamarans to naturally bank into turns much more like traditional monohull vessels.

For installation on symmetrical and semi-symmetrical hulls, Seakeeper Ride controllers can be mounted on both inboard and outboard sections of each demihull. On asymmetrical hulls, Seakeeper Ride’s controller will be mounted on the outboard section only where there is available space.

SEAKEEPER

Though Seakeeper has long focused on monohull vessels as its primary market, the Seakeeper option is already available on some catamaran brands, such as Costa Custom Boats, Freeman Boatworks, Front Runner Boats, Insetta Boatworks, Invincible Boats, SeaHunter Boats, and World Cat. However, performance prediction through Seakeeper’s proprietary sizing software has been unavailable. With more testing and better understanding of the variances in catamaran hull design, Seakeeper can more confidently size these vessels with up to 18 ft. (6 m) beams going forward for builder integration or refit applications.

Catamarans typically require 1.5 to 2 times the angular momentum (gyroscopic stabilizing power) than a monohull of comparable size due to greater natural roll damping characteristics. Installation has been done in either or both demihulls, above or below deck in between the demihulls.

SeaHunter Boats will be the first catamaran builder to offer Seakeeper Ride as standard equipment across its full catamaran line. SeaHunter offers the Seakeeper option as well, for the ultimate stabilized platform.

“We don’t just want to be a brand that says we make the best boats,” said Chris Conard, SeaHunter Boats Vice President. “We work hard at building the safest, fastest, and driest boats available, and that means incorporating the latest technology from other innovative companies to improve upon our already great-riding boats. The incredible performance of both products made the decision to incorporate both Seakeeper and Seakeeper Ride into our models a no-brainer.”

A Freeman Boatworks 28 will be available to demo at the Fort Lauderdale International Boat Show (FLIBS) from October 29 – November 2, 2025. Performance reports for catamarans equipped with both Seakeeper and Seakeeper Ride can be found at seakeeper.com/performance and ride.seakeeper.com/performance, respectively.

About Seakeeper Ride

Seakeeper Ride is the first-of-its-kind Vessel Attitude Control System (VACS), eliminating up to 70% of pitch and roll underway to dramatically improve the performance of vessels up to ~55 ft. A segment of Seakeeper, Inc., the global leader in marine motion control, Seakeeper Ride was launched in 2022 and is based in Fort Myers, Florida. For more information, visit ride.seakeeper.com.

About Seakeeper

Founded in 2003 and introduced in 2008, Seakeeper is the leading gyrostabilizer across the globe, changing the boating experience by eliminating up to 95% of boat roll, increasing comfort and safety onboard. Manufactured in Leesport, Pennsylvania, Seakeeper has a growing line of gyros for boats 23 ft. and greater. Together with Seakeeper Ride, which provides complete underway stabilization, the two products make Seakeeper, Inc. the leader in marine motion control. Learn more at seakeeper.com.