“СНП2” (TWS2) on MiG-29S

Third BVR mode is the “СНП” (Track-While-Scan 2 or TWS2) mode, which is available only on MiG-29 using R-77 missiles. It is activated from the “ОБЗ” (SCAN) mode by double pressing [RAlt-I]. The radar can correlate tracks for up to 10 targets simultaneously in “СНП2” (TWS2) mode. The main distinction from TWS mode is that TWS2 has a possibility to attack 2 targets at the same time and make a simultaneous or sequential launch of the R-77 missiles.

TWS mode provides automatic target lock on (transition to STT). This is enabled by moving the radar cursor over a target. The cursor will “snap” to the target and follow it thereafter. Automatic lock on occurs at a range equal to 85% of the calculated maximum weapon launch range. The pilot also can force an earlier lock on by pressing the [Enter] key.

Range scale Radar cursor

Radar active "Crosshairs" symbol

TWS2 mode Target mark

Figure 41: “СНП2” (TWS2) MODE - BVR

The “Ц1” (and “Ц2”) symbols appears in the bottom center of the HUD after the target was locked. Primary (first) target is displayed as “diamond” symbol on the HUD. Secondary target is displayed as a “crosshairs” symbol on the HUD.