Eastern Shipbuilding Group, Inc. announced that it has won contracts from Hornbeck Offshore Services, LLC. for two 302’x76’x26’ Multi-Purpose Supply Vessels. Eastern is currently under contract to construct four 292’ and six 302’ OSV’s for Hornbeck, now adding two MPSV’s each built to a design from STX Marine. STX Marine with offices in Canada and the United States provides the design based on the very successful and proven Eastern Shipbuilding OSV/PSV Tiger Shark Class Series.
These vessels will be U.S. flagged, Jones Act-qualified 12,070 BHP, diesel electric powered, twin azimuthing Z-drive, DPS-2 Multi-Purpose Supply Vessels and have been designated as the HOSMAX 310ES MPSV by Hornbeck Offshore. They will be AC Diesel-Electric powered, twin Z-drive propelled OSV’s measuring 302’x76’x26’. These vessels are to be ABS Classed Hull and Machinery, Oceans Service and reviewed for the United States Coast Guard under the Alternate Compliance Program (ACP 2-95) with the following Class Notations, A1, AMS, ACCU, DPS-2, UWILD, FFV-1, Circle E, Offshore Support Vessel (HNLS, HDC, HLC), GP, RRDA, HELIDK, ENVIRO, CRC, SPS (Special Purpose Ship) and certified under SOLAS.
These high-tech vessels will feature four CAT 3516C 16-cylinder turbo-charged Tier III diesel generator engines that are rated 2250 kW at 1,800 rpm. Main propulsion power will be provided by two GE Energy furnished Hyundai 2500 kW 690VAC motors driving two Schottel SRP 2020 FP Z-Drives with nozzles rated at 2,500 kW at 1,025 rpm each for a total of 6,704 Hp. Schottel also will provide three STT 3 fixed pitch tunnel thrusters, two bow and one stern thruster, each rated at 880 kW at 1,500 rpm, with direct coupled Hyundai 690VAC electric motors. A third bow thruster will be a swing down azimuthing thruster provided by Rolls Royce, model TCNS 73CP rated at 880kW at 1,800 rpm.
GE Energy Power Conversions will provide the complete system integrated diesel electric package, including the propulsion and thruster drives, four 2250 kW generators, motors, control systems, Duplex Series C DP system, switchboards, motor control centers, automation and navigation/ communication electronics. The vessels are designed with one Caterpillar C9 238KW at 1,800 rpm emergency generator provided by LA Machinery.
Each vessel will have accommodations with seventy-three berths, galley and mess areas, a three berth sick bay, a cinema/conference room with seating for eighteen and a fully outfitted gym. The ROV control room, client operations center and a second conference room with seating for twelve is located on the 01 deck. The bridge will have a full complement of the latest electronics, communication and DPS-2 redundant operation stations. Each vessel shall be equipped with an octagonal shaped 20.9m diameter aluminum helideck manufactured by Helidex. The helideck is sized for a Sikorsky S-92 helicopter with a helicopter reception with seating for eighteen persons.
For heavy offshore subsea construction work, a 250MT Active Heave Compensated Knuckle Boom Offshore Crane with 3,700 meters of main wire shall be installed, Model HMC 4240 LKO 350-40, manufactured by MacGregor of Norway AS. A second electro-hydraulic deck crane manufactured by North Pacific Crane Company Model 327 has a capable of lifting a minimum of 1,500 lbs. at 27 ft. radius and shall be used to handle gangways and vessel stores.
Each vessel is designed with a 15’ x 18’ moon pool and hydro acoustic hull penetration. The vessel’s electrical system is arranged to power two ROV/LARS systems. The vessels are fitted with an anti-heeling system and stability tanks to counteract the heeling moments associated with heavy crane lifts over the sides of the vessel.
These two HOSMAX MPSV’s have dual-role use with offshore capabilities for use as an Offshore Supply Vessel. The approximate total below-deck capacities are:
Total Fuel Capacity: 538,140 USG
Day-tank Fuel Capacity: 15,000 USG
Drill Water/Ballast Capacity: 637,840 USG
Potable Water Capacity: 29,810 USG
Liquid Mud Capacity: 21,020 bbls. 10 Tanks
Methanol Capacity: 1,900 bbls. 2 Tanks
Clear Deck Area: 10,338 sqft.