65′ Semi-Submersible Viewing Vessel Previous

Length Overall*: 19.81m/65’ 0
Beam Overall: 5.03m/16' 6
Max Horsepower: Two 120 SHP Diesel Engines
Capacity: Up to 51 Persons
Construction: Fiberglass

Memorable and Fun for Everyone

Launched and very profitably operating is the first semi-submersible, 49-passenger viewing vessel completely built in high-strength, low maintenance fiberglass reinforced plastic. Boat number one, named SS NAUTILUS, was constructed at the Willard Marine facility in California for Catalina Adventure Tours, Inc., which serves thousands of annual visitors to Avalon, Catalina, enabling them to explore and view the beautiful coastal island waters and sea life. An investment has been made in the molds for this vessel so that sisterships can be constructed and receive U.S. Coast guard passenger approval in an expeditious and cost-effective manner. This vessel is the perfect destination activity for those in the tourism industry. In the right operating environment, this unique vessel will amortize its capital cost in two to three years. The revenue from the special Fish Feeder Concession option can pay for the cost of crew.  Contact us to develop a semi-submersible vessel for your business.

Optional Equipment

  • Two heads under console
  • Electronics per user requirements
  • Various engine manufacturers and ratings
  • Generator for 110 VAC or 220 VAC power
  • Thrusters bow and stern
  • Head with holding tank
  • Underwater lighting for night viewing
  • Fish-feeder concession, power operated or manual system
  • Multimedia video/stereo
  • Anchoring equipment
  • Deck equipment


  • Builder: Willard Marine, Inc.
  • Designer: Allen Andrews Design
  • Owner: Catalina Adventure Tours, Inc.
  • Use: Semi-Submersible Underwater Viewing Vessel
  • Length: 65’
  • Beam: 16.5’
  • Depth: (Molded) 10’
  • Draft: 6.3’
  • Displacement: 203,000 Lbs., including 123,000 Lbs. of Ballast
  • Mail Propulsion: Two 120 SHP Diesel Engines
  • Marine Gear: Twin Disc, V-Drives, Model 506
  • Controls Kobelt:, Dual Lever
  • Steering System: Marol Hyd. MRB-50
  • Speed: 7 Knots
  • Hull Construction: Solid FRP Construction to Comply with ABS Rules
  • Underwater Windows: Twenty-eight (28) at 26” Diameter
  • Crew/Passenger: Capacity 2 Crew/49 Passengers
  • Capacities: Fuel—300 Gal.

Certification: U.S.C.G. Approved, Small Passenger Vessel, 49 Passengers

*Length Overall (LOA) is defined as the distance from the furthest bow appendage to the furthest stern appendage including the tube, collar or fendering; it does not include the propulsion system or optional features such as engine guards or swim steps. Published boat specifications contained herein can be adjusted to accommodate your mission type and desired boat design.