MAY 23, 2013 — Leevac Shipyards Jennings LLC, of Jennings, LA, a subsidiary of Leevac Shipyards, LLC reports that it has signed contracts with Hornbeck Offshore Services, LLC, an affiliate of Hornbeck Offshore Services, Inc. (NYSE:HOS) of Covington, LA for the construction of two 302 ft x 76 ft x 26 ft, 12,070 BHP diesel electric powered MPSVs of STX Marine SV 310 design.

"These will be the twenty-third and twenty-fourth vessels to be built by Leevac for Hornbeck," says Christian Vaccari, President and CEO of Leevac.

The SV 310 multi-purpose supply vessel is described by the shipbuilder as "a very complex vessel design" with unique characteristics integrated into the design by Hornbeck Offshore to meet a number of subsea inspection, repair and maintenance (IMR) support and heavy lift requirements.

The vessels will be outfitted with a 250 ton crane provided by Cargotech, and will be powered by four Caterpillar Model 3516C Tier 3 IMO II Marine variable speed diesel propulsion generator sets rated at 2250 kw each. The propulsion drives and thrusters are being provided by Schottel. GE Power Conversion is the vendor for the integrated electrical system, power management, vessel control, DP-2 systems, machinery alarms, power and propulsion systems.

Marine Interior Systems has been selected for the joiner work and Marine Aluminum will be providing the helideck system rated for a Sikorsky S-92 helicopter.

The vessels will be built to ABS, USGC and SOLAS classifications.

They will be ABS classed with the XA1 Offshore Support Vessel (FFV-1) notation for off ship fire-fighting capabilities and SPS (Special Purpose Ship) notation.

"Hornbeck Offshore is pleased to once again be building at Leevac" stated Todd Hornbeck, President and CEO of Hornbeck Offshore. "The team at Leevac has delivered the majority of the new vessels that we have constructed since 1997, and we are confident that when delivered, our HOSMAX 310 MPSV's will continue the string of additions to the HOS fleet from the Leevac yard that have historically enhanced our ability to deliver reliable service to our customers, and solid returns to our shareholders."

Christian Vaccari, President and CEO of Leevac went on to say "Exceeding our customer's expectations by building quality vessels on time and on budget while maintaining an safe work environment is how we preserve long-term relationships with our customers. I am very pleased to see Hornbeck expand their building program with us. This contract will bring our employment count to over 600 jobs in Southwest Louisiana and extend our backlog into early 2016.

Leevac is currently building two Z-Tech 2400 Class Escort Tugs for G & H Towing Company, one MMC 879 PSV, two LDS 300 DE PSV's for Tidewater Marine, and two LDS 270 DE PSV's for Aries Marine."

Leevac Shipyards Jennings LLC is a subsidiary of Leevac Shipyards LLC. The new construction yard is located in Jennings and the repair yard is located in Lake Charles, LA.