Benjamin Sisko and Jake Sisko once visited the surplus depot. Jake was impressed by how many starships were there. (DS9 short story: "Fear, Itself") In 2368, the crew of the USS Enterprise discovered that the Ferengi and other species had been taking materials from the salvage of Federation starships at Surplus Depot Z15 without the Zakdorn noticing. (TNG episode: "Unification") In 2371, Commander Sisko obtained a Cardassian shuttle from Surplus Depot Z15 to use in a mission to Goka. (DS9 - The Maquis: Soldier of Peace comic: "Rats in a Maze")