On Feb. 3,  Eastern Shipbuilding Group delivered the HOS Riverbend (Hull 204) to Hornbeck Offshore Services.

The 292’x64’x24’6” HOS Riverbend  is Eastern’s fourth and final vessel designated as the HOSMAX 300 series by Hornbeck Offshore. Each vessel is a diesel-electric powered, twin Z-drive propelled OSV. These vessels feature four Caterpillar 3516C 16-cylinder turbo-charged Tier 3 diesel generator engines each rated at 1,825 kW at 1,800 rpm. Main propulsion power is provided by two GE Energy furnished Hyundai 2,500 kW 690VAC electric 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 provides two STT 4 fixed pitch tunnel thrusters rated at 1,180 kW at 1,170 rpm, each with direct coupled Hyundai 690VAC electric motors. GE Energy Power Conversions provides the complete system integrated diesel electric package, including the propulsion and thruster drives, motors, control systems, DP system, switchboards, motor control centers, automation and navigation/communication electronics. These vessels are capable of a cruising speed of 12 knots. The fully integrated bridge is arranged for increased visibility and features the latest technology in navigation, communication equipment.

The HOSMAX 300 Offshore Support Vessels feature the following:

Deadweight Tonnage: 5,650 LT
Total Fuel Oil Capacity: 241,141 gals.
Fuel Oil Day-tanks 20,190 gals.
Drill Water/Ballast Capacity: 562,822 gals.
Potable Water Capacity: 57,494 gals.
Liquid Mud Capacity: 20,846 bbls.
Dry-bulk Mud: 14,347 cu. ft. 
Methanol Capacity 1,605 bbls.
Clear Deck Area: 197’x55’ (10,585 ft²)

The remaining six OSVs under contract are designated HOSMAX 310 Offshore Support Vessels. The first of which the HOS Bayou (H205) delivers in a few months and the second the HOS Black Foot (Hull 206) launched on Jan. 17, 2014. The Deadweight Tonnage for the HOSMAX 310 design is 6,144 LT. The total below-deck capacities include 285,649 gals. of diesel fuel, 609,227 gals. of drill/ballast water, 21,509 bbls. of liquid mud, 14,347 cu. ft. of dry-bulk mud, 2,212 bbls. of methanol and 62,538 gals. of potable water.

All ten of the HOSMAX Offshore Supply Vessels under contract are USCG, ABS Classed A1, Offshore Support Vessel and Ocean Service, Loadline, AMS, ACCU, Circle E, DPS-2 with additional ABS Class notations UWILD, ENVIRO, FFV-1 and certified under SOLAS/IMO. Additionally, HOS has contracted with Eastern for two HOSMAX 310ES Multi-Purpose Supply Vessels (MPSV’s) with accommodations for 73 persons, a 250MT subsea crane, moon pool, helideck and two ROV/LARS units.