http://www.marinelink.com/news/ng-upgrades-nav-for-u-s-navy-patrol-craft/ng-upgrades-nav-for-u-s-navy-patrol-craft332659
NG Upgrades Nav for U.S. Navy Patrol Craft
Northrop Grumman Corporation’s (NYSE: NOC) Sperry Marine business unit has been awarded contracts to upgrade the navigation systems on three U.S.