Serodino Inc., Chattanooga, Tenn., recently delivered a Super Tiger Class workboat to Parker Towing of Tuscaloosa, Ala. The twin-screw mv. Johnny R. Holt is compliant with all Coast Guard Subchapter M rules.
The new boat has two Cummins QSK-19M engines, developing a total of 1,500 hp. at 1,800 rpm., with Twin Disc MGX5222, 4.03:1 reverse and reduction gears turning 4-1/2-inch sleeved shafts through Simplan dripless shaft seals. The 52- by 41-inch, four-blade propellers are by Michigan Wheel. Two 40 kw. John Deere MDDCA light plants furnish auxiliary electric power.
The follow-up lever controls in the pilothouse separately activate four flanking and two main rudders. The Skipper steering system utilizes hydraulic pumps driven by electric motors.
Equipment includes navigation lights, one incandescent and one Xenon searchlight, Furuno radar, two Wintech electric winches, Schuyler rubber towknees and perimeter fenders, shore power plug-in, engine alarms, Crapzapper waste water treatment and Fernstrum coolers.
The hull is 60 by 24 by 8 feet, with a 6-foot draft. It is constructed of 3/8-inch plate throughout with 1/2-inch plate over the wheels and on the bilge knuckles.
Transverse framing is a 7-inch channel on 24-inch centers with 3- by 5- by 3/8-inch frames in the bow. The inside motor mounts are continued fore and aft as solid sheets to divide the hull into three collision compartments, three fuel tanks (9,000 gallons), engineroom, three water tanks, (3,000 gallons total capacity) and six stern compartments. A 110-gallon lube oil tank and a 120-gallon transmission oil tank are built into the hull.
The superstructure is constructed of 3/16-inch plate with 2- by 2-1/2- by 1/4-inch framing. The doors are steel, and windows are aluminum with safety glass panes. All quarters are insulated, aluminum-paneled, heated and air-conditioned and have rubber floor covering.
The first deck is 17 by 32 feet and includes a 17- by 12-foot galley, a modest head with shower and a Coast Guard-approved marine toilet. The second deck is 11 by 10 feet as a deck locker. The pilothouse has full instrumentation and vessel control. There is a 4-foot space below the pilothouse to make for an eye level of 28 feet.
The hull is painted with Rustoleum 9100 epoxy two-coat system. The superstructure is hand-tool cleaned and painted with Rustoleum 769. The decks are coated with non-skid surface.
Parker Towing plans to christen the Johnny R. Holt in the spring.
Caption for photo: The 1,500 hp. mv. Johnny R. Holt is powered by Cummins QSK-19 M engines. (Photo courtesy of Serodino Inc.)