Horizon Lines plans to convert the power plants on two of its steam turbine cargo vessels to modern diesel engines capable of burning conventional liquid fuels or liquefied natural gas (LNG). "We are viewing this as the first step in a repowering initiative for Horizon Lines vessels serving in the Hawaii and Puerto Rico trade lanes," said Sam Woodward, President and Chief Executive Officer. "The two initial steam vessels targeted for the planned repowering are structurally viable for the conversion from steam-powered to dual diesel/LNG engines.