Under Seaport-e the Northrop team will provide support to the Naval Sea Systems Command, Navy Program Executive Offices and Navy Warfare Centers for all phases of naval ship and shipboard weapon systems acquisition and life-cycle support. This indefinite delivery/indefinite quantity contract will be performed over a base of five years, with options to renew for two award terms of five years each.

See the link:   http://www.ms.northropgrumman.com/markets/MDSEteam.html