Given the advancing age of its current HC-130P/N airframes, all of which are based on either the venerable (and since retired) mid/late-1960s vintage C-130E airframe or the more recent mid-1990s vintage C-130H2/H3 airframe, the Air Force plans to eventually buy up to 78 HC-130J Combat King IIs to equip rescue squadrons in the active Air Force, the Air Force Reserve Command and the Air National Guard.