BATH — Defense contractors that came up with radically different designs for shore-hugging warships for the Navy have delivered bids on a lucrative contract to build 10 more of them.

Officials from Lockheed Martin and Austal USA confirmed their bids were submitted today. The contract calls for construction of two littoral combat ships with options for up to 10 ships with a value of $4.8 billion. The Navy hopes to announce the winner this summer.

Each team has delivered one ship and is building a second. Austal’s ship is a tri-hulled aluminum trimaran, while Lockheed’s version utilizes a single steel hull.

Austal broke away from its partner, Maine’s Bath Iron Works, for the contract. That allows BIW to bid on a separate five-ship contract in 2012.

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