C4
Two RSAF F-16D Block 52s, in the markings of each of the two Tengah-based RSAF F-16 squadrons, hold short near Darwin's Runway 29 awaiting departure for an afternoon Pitch Black mission.
A RAAF Hornet holds short while the RSAF's Gulfstream 550 Conformal Airborne Early Warning (CAEW) returns from an afternoon Pitch Black sortie.
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.
See photo in original gallery.