Seaford Nine Base was one of the People's Republic of Haven's largest naval base in the border region with the Manticoran Alliance. The base was located in the Seaford Nine System.
In 1904 PD, the base was under the command of Admiral Yuri Rollins. The base was given reinforcements of two superdreadnought squadrons, one dreadnought squadron, one under strength battlecruiser squadron, a half dozen cruiser squadrons, and three dozen destroyer flotillas as escorts. (HH3)
Prior to the system's fall to the Manticorans, the PNS Jonathan Talbott delivered routine traffic messages to the system's PRH base. (JIR2)