The KC-130 tankers, originally C-130F procured for the US Marine Corps (USMC) in 1958 (under the designation GV-1) are equipped with a removable 3,600 US gal (13,626 L) stainless steel fuel tank carried inside the cargo compartment.
C-130H models produced from 1992 to 1996 were designated as C-130H3 by the USAF.