an active AOJ lock is not measured by the radar but rather provided by the fighter pilot (e.g.
according to instructions received by radio), with the default value 10 km. If the entered target
range is longer than the range of the chosen missiles for this altitude, then missile launch requires
either that the entered range is manually reduced with [RCtrl--] until the "ПР" symbol appears, or
that launch authorization override is enabled with [LAlt-W].
It should be noted that when using missiles against a jamming target, the lack of range information
can make it difficult to gauge when to shoot - the target may be outside the permitted launch zone.
In addition, missiles flying in the passive mode have a lower probability to hit the target.
At the range of less than 25 km to the jammer, the radar power is sufficient to "burn through" the
jamming and provide accurate target location, including range. The display on the HUD then
becomes the standard SCAN mode showing the distance to the target.
THE MOMENT WHEN THE FIGHTER RADAR CAN RECOGNISE THE REFLECTION OF ITS OWN SIGNAL ABOVE THE
JAMMING NOISE AND RECEIVE THE INFORMATION ON THE TARGET MOVEMENT IS CALLED "BURN-THROUGH".
WHEN THE RADAR STARTS TO PROVIDE FULL DATA ON THE TARGET DESPITE THE PRESENCE OF ECM, THE RADAR
HAS "BURNED-THROUGH" THE INTERFERENCE.
Figure 55: SCAN Mode with jammer strobe
• Blinking vertical countermeasures strobe is located at the jammer azimuth. Upon locking it,
the information on the HUD is similar to the STT mode with fixed mark of the current range
to the target.
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