General Dynamics (GD) Electric Boat has been awarded a modification contract by the US Navy in support of the common missile compartment for the next-generation ballistic missile submarines for the UK Royal Navy and the US Navy.

The $15.8m award is a modification to a previously awarded $76m contract announced in December 2008.

The company will provide continued engineering, technical services, concept studies and design for the missile compartment being developed for the UK’s Successor ballistic-missile submarine and the US Ohio replacement submarine.

The total contract would have a value of more than $651m if all options are exercised and funded.