On March 28, Eastern Shipbuilding Group Inc. launched the HOS Black Rock for Hornbeck Offshore Services LLC at the yard’s Allanton, Fla., facility. The 302’x64’x26′ Black Rock is Eastern’s third of six vessels in Hornbeck’s HOSMAX 310-class series. The OSVs have a deadweight tonnage of 6,144 LT and fefeature four Caterpillar 3516C 16-cylinder turbocharged Tier 3 diesel generator engines each rated at 1,825 kW at 1,800 rpm. Main propulsion is provided by two 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. The OSVs have a top speed of 14 knots.