Platypus Marine has delivered a new 58-foot trawler/seiner, the F/V Adamant, to Petersburg, Alaska’s Adamant fisheries. The new boat, designed by prolific fishing boat designers Hockema & Whalen Associates, was built within fourteen months from the ground up at the Platypus yard in Port Angeles, Washington. The new boat will seine, trawl and pot fish, and Yaquina Boat Equipment will provide trawl equipment for the fall after the seine season.
Platypus Marine has a long history of repairing, upgrading or building new 58-foot seiners, and Adamant Fisheries has been a client for more than 20 years. The new boat, to be operated by Adamant Fisheries principals Mike Neuneker and Kyle Franklin, will join a sister boat, also designed by Hockema & Whalen, the 58-foot F/V Intangible. The overall design and efficiency of the first vessel led the company to choose Hockema & Whalen to design their second boat as well. The two vessels are similar, but while the Intangible is fitted with a foil under the propeller to make the propulsion system more efficient, the new boat is fitted with a Nautican nozzle and triple rudder, which is expected to increase efficiency a further 20 percent.
“The Nautican system is very efficient,” says naval architect Hal Hockema. “It offers a lot more thrust at towing speeds, and the maneuvering characteristics have been very good as well.” Hockema credits his company’s project manager, Paul Monical, with the success of the vessel’s construction. He also notes that Adamant fisheries made good choices in terms of materials and workmanship. “There’s quite a bit of stainless steel in the boat,” Hockema says. “The boat has all stainless guards and bulwark caps, which will require less maintenance. They put their money where it’s most effective.”
A large bulbous bow contributes seakeeping capability and fuel efficiency, while a hydraulic bow thruster provides low-speed maneuverability. A full marine electronics package provided by Radar Marine in Bellingham provides navigational and fishing electronics in an efficient, easy to read layout, while apitong wood decks provide grip and wear resistance while working on deck.
The construction of the boat was a collaborative effort between Adamant and Platypus, with each company bringing years of expertise to the table.
Platypus Marine’s marketing department says the Adamant’s hull shape offers better efficiency when the boat is empty, but also when fully laden, and notes that the design could reduce fuel consumption by as much as 15 percent, which could translate to a $30,000 savings from what would normally be a $200,000 annual fuel bill.
Top speed for the F/V Adamant will be 9.5 knots, and a cruising speed of eight knots while running the engine at 1,400 RPM will consume less than 10 gallons per hour. The main engine is a Cummins Tier II QSK19 rated at 750 horsepower, supplied by Tri County Diesel and turning the Nautican-shrouded prop from Sound Propeller through Twin Disc gears. The boat is also fitted with a 65 kW auxiliary generator also provided by Tri County Diesel as well as a 30 kW Northern Lights genset.
Bellingham, Washington’s Radar Marine Electronics outfitted the well-equipped wheelhouse with three Green Marine 17-inch Sunlight Readable Marine Monitors. These provide ample viewing for an OLEX AIS & Bottom Mapping System and an ES70 Split Beam 38kHz Sounder offering fish sizing, biomass and direction, both provided by Simrad Kongsberg, as well as a Simrad AP70 Autopilot.
Radar coverage is provided by a Furuno 1835 4 kW, 48 NM Radar System with 10.4 Inch Color LCD Display and 3.5-foot open array, as well as a Furuno FR8252 25KW w 6ft Antenna. A Furuno CH250BB 88 kHz Black Box Searchlight Sonar System helps spot fish, and includes a 400mm Travel Hoist.
The F/V Adamant fuel tanks are divided fairly evenly between seven tanks with an in line centrifuge and a 600 gallon day tank. The fuel manifold allows for trim adjustments throughout all the tanks to allow for cargo distribution, based on which fish holds the operator is using. Each fish hold capacity has been balanced for optimum refrigeration efficiency. The aft tank, at 500 cubic feet, can be quickly dropped to 25 degrees, to serve as a freezer hold for storing bait. This tank can also be flooded and used as a refrigerated seawater (RSW) tank for salmon. An onboard packing capacity of 180,000 lbs. allows for an adequate freeboard (fuel dependent) with the net and skiff onboard.
Fleet Refrigeration, of Petersburg, Alaska, provided the refrigeration technology for the new boat, which has two separate 18-ton chillers, allowing one to be run with the smaller, 30kw generator, which also provides hotel power. The second, larger generator can provide power for both systems plus the full hydraulic load and ship’s electrical power. It has a two-bearing 65 kw generator driven off the front of the engine, and a 160 gpm of hydraulic power off of the back of engine. The vessel has an ample hydraulic capacity of roughly 150 gpm with the hydraulic system designed and installed by Puget Sound Hydraulics.
The fishing gear and equipment, including square tube main and picking booms by Seven Stars Fabrication, have been designed for strength and efficiency in movement, as well as versatility.
The boat’s hull steel work is ABS inspected and certified.
Representatives of Adamant Fisheries have expressed their satisfaction with the new boat, and at press time the F/V Adamant had arrived in Petersburg in time for a July 17th salmon opener.