Mather AFB, UNT was transferred to the 12th Flying Training Wing (12 FTW) at Randolph AFB, Texas in late 1993 and all USAF navigators except those destined for the B-1B and F-15E subsequently received their wings at that location. Concurrent with the move from Mather to Randolph, a parallel student USAF Navigators track was established for those officers desiring to become weapon systems officers (WSOs) in the B-1B and F-15E. These officer students proceeded to the U.S. Navy's Training Air Wing SIX at NAS Pensacola, Florida and followed a training track nearly identical to USN and USMC Student Naval Flight Officers destined for tactical jet aircraft. The separation between CSO candidates previously attending UNT with the 12th Flying Training Wing (12 FTW) at Randolph AFB until 2009, and those who attended a joint program with the U.S. Navy's Training Air Wing SIX (TRAWING 6) at NAS Pensacola, Florida was in the type of operational USAF aircraft the candidates would later fly: Navigators that graduated from Randolph AFB were eventually assigned to C-130 airlift; KC-135 aerial refueling; AC-130 and MC-130 special operations; HC-130P combat search and rescue; WC-130J weather reconnaissance; OC-135/WC-135/RC-135 reconnaissance; EC-130H Compass Call, EC-130J Commando Solo, E-3 AWACS or E-8 J-STARS electronic warfare; or B-52 Stratofortress bomber duties. Navigators trained via this track were also assigned to fly the E-4, the VC-25, and until its 2001 retirement, the VC-137. However, these latter three aircraft were not direct entry positions for recent flight school graduates and were/are crewed only by highly experienced navigators previously qualified in another aircraft. Navigators-cum-CSOs graduating from NAS Pensacola were assigned as weapon systems officers in the F-15E Strike Eagle strike fighter, the B-52 Stratofortress, or the B-1B Lancer bomber after follow-on EWO training at Randolph AFB. With the establishment of the 479 FTG and UCSOT, the integrated training program with the U.S. Navy and U.S. Marine Corps at TRAWING 6 was discontinued. However, despite the divergence of USAF CSO training from student naval flight officer (NFO) training, all CSOs for all USAF aircraft model design series (MDS) now receive their training at NAS Pensacola. While some extant USAF MDS aircraft, such as the pure airlift variant of the C-130E are being retired, and the pure airlift version C-130J have eliminated the navigator/CSO position, all the other aforementioned extant MDS aircraft, as well as the HC-130J, MC-130J and WC-130J currently entering the inventory, continue to retain