诺斯洛普·格鲁门
Northrop Grumman Sperry Marine is part of Northrop Grumman Electronic Systems and, through various mergers, has built a heritage that includes Decca Radars, Sperry Marine, and C. Plath. Northrop Grumman purchased Litton Industries in April 2001 forming Northrop Grumman Sperry Marine.