SS Petersburg (T-AOT-9101) is one of Military Sealift Command's two US Government-owned tankers and is part of the 35 ships in the Prepositioning Program. It is part of Maritime Prepositioning Ship Squadron Three. Its normal crew complement is 38 civilians and no military personnel. Originally built in 1963, the Petersburg is one in a fleet of five tankers fitted with an offshore petroleum discharge system. She can carry up to 225,000 barrels of JP8 fuel.