Hornbeck Offshore Executes Contracts for Two HOSMAX 310 MPSV’s

Eastern Shipbuilding Group, Inc. has announced that Hornbeck Offshore Services, LLC. has executed contracts for two 302 ’x 76 ’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, DP S – 2 Multi-Purpose Supply Vessels and have been designated as the HOSMAX 310 ES MPSV by Hornbeck Offshore. They will be AC Diesel – Electric powered, twin Z – drive propelled OSV ’s measuring 302’x 76 ’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) and certified under SOLAS.

These high-tech vessels will feature four CAT 3516 C 16-cylinder turbo-charged Tier II I 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 690 V AC 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 690 V AC 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.

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 design ed 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.

Eastern Shipbuilding Group, June 27, 2013

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