The U.S.S. McKinley is a battleship which serves as the mobile command center and base of operations for the Mobile Trench Brigade. The McKinley contains repair and modification stations for up to four Mobile Trenches, a Mission Briefing center where Commander Frank Woodruff briefs Trench Pilots on missions, and a Radio Room for contacting other players. During missions, the McKinley utilizes Scrap collected by players to make and launch Emplacements onto the battlefield as needed. Additionally, the McKinley was built with four legs, allowing it to leave the sea and travel on land. The ship is vulnerable to Monovision attacks while on land, however, and in some missions must be defended.