The contract, which has a value of $218 million, also includes delivery of two mission suites that are critical for conducting search-and-rescue operations.
"The Coast Guard, like many services in the Hercules family, continues to recapitalize with the C 130J," said Jack Crisler, Lockheed Martin vice president for Air Mobility. "The C 130J is without equal in terms of its multi-role, multi-mission flexibility and availability.
"No aircraft in production -- or in development -- can match the capabilities of the Super Hercules."
The aircraft are to be delivered in early 2015.
The Coast Guard's HC-130Js are stationed in North Carolina and patrol in areas that cannot be patrolled efficiently by medium-range surveillance aircraft or cutters. They also provide heavy air transport for maritime safety and security teams, port security units and National Strike Force personnel and equipment.
Notable deaths of 2014 [PHOTOS]