Morgan City, La.-based Halimar Shipyard has built a new 205'×32'×7'6", DP-2 aluminum crew/supply boat for Barry Graham Oil Service, Bayou La Batre, Ala. The John Jacob was based on an Incat Crowther design.
“This one is really efficient,” said Miles Thomas, Incat’s project manager. “The water plane area where the vessel touches the water is far sleeker than other boats, cutting down on drag.”
The John Jacob’s capacities include 17,484 gals. of cargo fuel; 15,296 gals. vessel fuel; 41,912 gals. rig water or ballast water; and 12,079 gals. fresh water. The 3,640-sq.-ft. rear cargo deck can haul up to 450 LT of freight.
Four Cummins QSK 50 engines, producing 1,800 hp each, provide the new crew/supplier with its main propulsion. The diesels drive Twin Disc MGX-6848 gearboxesand four HamiltonJet HM811 waterjets through Driveline Service of Portland-supplied Cardan shaft assemblies. Top speed is 32 knots.
“What used to take this type of vessel 12 hours to make a run, now takes eight or nine hours in this boat. It’s 30 feet longer, and it’s making the same speed as the smaller boats,” said Thomas.
Three Thrustmaster tunnel bowthrusters, each producing 150-hp, give the John Jacob front-end power for dynamic positioning and close-quarters maneuvering.
Ship’s service power is provided by three Cummins 6CTA 185-kW gensets.
Another feature of the new boat is its FiFi 1 firefighting system with two FFS 5,300-gpm engine-driven pumps, integral clutch assemblies and remote controlled monitors.
The main deck cabin has 72 passenger seats, passenger shower and toilets, stores, a dedicated DP equipment room and access to the upper deck wheelhouse. A cargo-deck locker provides for storage of deck cargo securing equipment and other safety gear. Upstairs, the wheelhouse features both forward and aft-facing control stations. Beier Radio provided the DP-2 control system.
The John Jacob is USCG Subchapter T approved and ABS classed for DP-2 service. The boat was delivered in April. — Ken Hocke
