Altair V is an unknown location that is only mentioned in the Nintendo Comics System, and is said to have been where Samus' gunship was constructed. It seems to have been replaced by Aliehs III, mentioned in the Logbook scans for the gunship in Metroid Prime 2: Echoes and Metroid Prime 3: Corruption.
Vessel is fourth and most advanced model in series (Hunter I, II, and III destroyed under unknown circumstances). All four ships based on Hyrodine Space Systems, Explorer Class Scout Ship (manufactured at Hyrodyne Shipyards, Altair V).
Already considered most advanced in its class, Hunter IV has been highly modified by owner Samus Aran, and other unknown technicians.