Cited from "Fighter Academy"
http://www.sci.fi/~fta/Su-27.htm

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The MiG-29 Lazur Data Link System:

The Lazur Data link System is a two-way system, GCI-to-Fighter and Fighter-to-GCI. It is composed of the SAU-451-04 automatic control system, the E502-20/04 airborne guidance system, the R-862 radio, A-611 marker radio receiver, SO-69 ATC responder with the UNN block/K-42E kit, the ARK-19 radio compass, the TESTER-UZ/LK flight data recorder, and the ALMAZ-UP information reporting system. The MiG-29 appears to have no Fighter-to-Fighter capability yet. Transmitted target information is displayed on the HUD display which is the primarily display, then on the radar scope and appropriate cockpit instruments. The "GUIDANCE" switch on the Air-to-Ground Panel must be "ON". A Data Link Frequency nees to be selected and a Data Link Mode selected from the "GCI SITE", "AIR TRAFFIC", or "TERMINAL" options. The system operates in the VHF frequency band and is effectively line-of-sight limited.

The information displayed with 54 symbols or directives, some are listed below:

* closure speed command go-to
* continuous distance to prime selected target
* fixed distance to targets indicated
* end of intercept (flight recovery) command
* end of intercept (change target) command
* engine power setting commands
* afterburner activation (what stages if any?)
* interceptor aspect commands (go-to)
* interceptor altitude commands (go-to)
* interceptor course commands (go-to)
* interceptor speed commands (go-to)
* interceptor turn commands (go-to)
* missile warm-up (AA-10) commands (approx 3 minutes)
* target assignment commands for priority
* target elevation delta (±) commands
* target true bearing commands for pointing
* target vertical speed (snap-up) command
* target range, look angle, speed, G, etc.