Sea Force IX: American-Built Custom Sportfishing Yachts

Sea Force IX Yachts for Sale

Elite Performance & Monolithic Construction from Florida

Founded in Palmetto, Florida by former charter captain Ron Rookstool, Sea Force IX designs and builds custom sportfishing yachts and superyacht tenders ranging from 41 to over 90 feet. Known for their monolithic hull construction and high-speed offshore performance, these yachts combine rugged capability with luxury-level finishes. Each vessel is fully tailored to the owner’s needs, offering advanced fishing systems, cutting-edge navigation technology, and spacious, hand-crafted interiors.

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    Current Sea Force IX Yacht Listings

    LOCATION: Coral Gables, Florida, United States

    ASKING PRICE: $1,699,000 USD

    LOCATION: Miami Beach, Florida, United States

    ASKING PRICE: $1,797,000 USD

    Sea Force IX Yachts

    About Sea Force IX Yachts

    Legacy of Performance and Precision

    Founded by seasoned charter captain Ron Rookstool in Palmetto, Florida, Sea Force IX was established to deliver high-performance sportfishing yachts capable of serious offshore operation. The brand quickly earned a reputation for building rugged, elegant vessels with exceptional range, speed, and fishability—crafted entirely in the U.S. with a hands-on approach to quality control.

    Tailored Design, Owner-Driven Execution

    Takes a fully custom approach to yacht building, collaborating closely with each client to design every detail—from engine packages and layout configurations to interior finishes and electronics. Each vessel is engineered around the owner’s needs, whether for tournament sportfishing, extended cruising, or luxury tender service.

    Notable Builds and Custom Milestones

    Signature builds include the Sea Force IX 94.5 Enclosed Bridge and a series of 81–91’ sportfish yachts known for their top-end speeds, custom tuna towers, and advanced systems integration. Many Sea Force IX owners are experienced yachtsmen who return to the yard for follow-up projects and long-term service support.

    Advanced Hull Technology and Build Integrity

    Yachts feature a proprietary monolithic hull design—vacuum-infused, vinylester GRP with a bonded stringer grid—offering exceptional structural integrity and a quiet, smooth ride offshore. The yard emphasizes weight balance, fuel efficiency, and long-range performance, incorporating modern composites while maintaining a focus on rugged, low-maintenance construction.

    Sea Force IX at a Glance

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    Based in Palmetto, Florida, Sea Force IX is a premium American yacht builder specializing in custom sportfishing and convertible yachts.

    Specialities

    The yard is renowned for bespoke sportfishing vessels and yacht tenders built to each owner’s exact requirements—ranging from tournament rigs to luxury offshore cruisers.

    Size Range

    Builds spanning from mid-40s to over 90 feet, including signature models like the 41.5 Sport, 82 Enclosed Bridge, and 94.5-foot flagship sportfish.

    Hull Configurations

    Their yachts feature deep-V, monolithic hulls vacuum-infused with advanced geometries that deliver exceptional ride comfort, stability, and offshore performance.

    Hull Materials

    Constructed using 100% composite materials, high-grade vinylester resins, epoxy bonding, and foam-cored GRP, they  IX delivers strong, lightweight, and quiet vessels.

    Services

    Fully custom builds, owner consultations, sea trial support, and comprehensive service through its Florida build facility and aftermarket network.

    Models and Specs

    Sea Force IX Models

    Build Without Compromise.

    At Worth Avenue Yachts, we turn visionary ideas into world-class yachts—crafted with precision, passion, and a commitment to your unique journey.

    2024 Palm Beach International Boat Show

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    Ready to bring your dream yacht to life? Get in touch with our new build specialists today and start your custom journey.

      Crafted to the highest standards, chosen for their legacy.

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