Singapore currently operates 20 F-16C Block 52 aircraft in its 60-strong F-16 fleet. 613 is from the first batch of aircraft, ordered in 1994 and serialed 94-0271.
Notoriously secretive, Singapore has been coy about revealing what equipment is inside the dorsal spine of its F-16Ds. Along with the F-16D Block 52s, the RSAF also operates 20 F-16D Block 52+ aircraft with the spine and Conformal Fuel Tanks.
Singapore's F-16C/Ds are numerically the most important type in the RSAF's fleet, and are regulars at Pitch Black. 615 is a F-16C Block 52 from the RSAF's second batch of 12 such aircraft, ordered in 1996. Seen here in the markings of Tengah-based 140 "Osprey" Squadron
Singapore was the second F-16 user after Israel to sport the distinctive dorsal on its F-16Ds, when the RSAF's first F-16D was rolled out in 1998. Seen here taking off is 692/96-5032, in the markings of Tengah-based 143 Phoenix Sqn
Thailand is one of only three countries outside of the United States to operate the Air Defence Fighter version of the F-16. This is the sole F-16B-ADF in the RTAF's inventory, serialed 10201 and serving with Korat-based 102 Sqn.
The Royal Thai Air Force are regulars at Pitch Black, and they're always good for bringing a special scheme aircraft or two. 2012 was no exception; this is F-16ADF 10209 carrying markings commemorating 100 years of aviation in Thailand
The Royal Thai Air Force contingent at Pitch Black 2012 consisted of aircraft from two squadrons, this is a F-16A Block 15 aircraft from 403 "Cobra" squadron, normally based at Takhli
Thailand operates three squadrons of F-16s, with a current fleet of just under 60 aircraft split among F-16A/B Block 15 and ADF variants. This is a 403 Sqn F-16B Block 15.
See photo in original gallery.