Lockheed Martin Corp. will provide the U.S. Navy with open-systems submarine electro-optical imaging systems under terms of an order that with options could turn out to be worth as much as $57 million. Naval Sea Systems Command announced a $7.2 million contract to the Lockheed Martin Mission Systems and Training segment in Manassas, Va., to provide two AN/BVY-1 Integrated Submarine Imaging Systems (ISIS) and spare parts. The ISIS provides mission critical, all-weather, visual, and electronic search, digital image management, indication, and warning for U.S. fast-attack and cruise-missile submarines. The order has options that could increase its value to $57 million. ISIS, which interfaces to Virginia-class, Seawolf-class, and Los Angeles-class fast-attack subs, as well as Ohio-class cruise-missile subs, provides a flexible architecture for inserting future capabilities as they become available, Navy officials say. The system has the potential for installation on Ohio-class ballistic missile submarines and other kinds of submarines.