Table of commands
On the head of the HUD there’s additionally a table of commands. It is a horizontal line of signs – commands and signals from the Weapon Control System and Targeting System and the ground, transmitted through the ARL-SM (Lazur) – which light up in the proper time. From left to right:
– “K” (control) – lights up during WCS system check performed by the “integral automatic selfcontrol system of the weapon control system”.
– “PPS” (front hemisphere) – lights up during instrument guidance on a target in its front hemishpere, and also when the special switch “front hemisphere – slow moving target – rear hemisphere” (PPS-MSKCh-ZPS) is set to PPS.
– “AVT” (automatic) – lights up during automatic control of the radar’s (working in rangefinding mode) scanning zone.
– “100”, “60”, “36” – when closing on the target, these lights signal the pilot that he has reached the said range.
– “F” (afterburner) – a command for the pilot to turn on the afterburner (additionaly he gets an audio signal in his headphones).
– “<“, “|”, “>” – warning/information signals. During instrument guidance, depending on the need, the shown above signals light up and go off informing the pilot in advance that in a moment he will receive a command to turn left, right or go straight.
– “!” (caution) – means “be advised, in a moment you will receive a new task, cease performing your current task”
– “A” (attack) – lights up when the targeting system switches from scan mode to STT mode.
– “G” (hill) – lights up when the AVM sends the signal to ascent (descent) while performing an R-23 attack and the plane was flying below (above) the target.
– “PR” (launch permited) – lights up when all the requirements for the effective engagement with the selected weapon were met.
– “T” (alarm) – lights up when the Lazur-M GCI sends the command to “immediately cease performing your current task and return to base”.
– “O-T” (retreat – break the attack) – is a command to immediately cease the attack and break away in a safe direction.
– “PD” (jamming of the rangefinder) – lights up when the operation of the radar’s rangefinder is compromised due to active jamming.
1 – Indicators of passive (“PP”) and active (“AP”) jamming;
2 – The “break away” (“OTV”) command;
3 – Range to target scale;
4 – Maximum range value depending on the mode of the targeting system (it changes as the interceptor closes on target);
5 – Indicators of a lock on target by (“A”) the radar or (“TP”) the IRST;
6 – The maximum values of the set altitudes of flight, depending on the targeting system mode (1,5km for a low flying target, 15km for a medium to high flying target);
7 – Flight altitude scale;
8 – Artificial horizon line;
9 – Central crosshair of the display;
10 – Indicators of uncompromised indication of course (“K”) and pitch (“G”);
11 – A-A missile launch permission indicators;
12 – Indicators of the directional position of the axis of the antenna of the radar during launching of missiles (indicator of the exact aiming during firing of
rockets or guns);
13 – guidance indicator (the aiming circle only appears during the operation of the targeting system in the manual mode of airplane control);
14 – guidance indicator (the small aiming circle only appears during instrument
guidance of plane to target);
15 – actual (current) range to target;
16 – IRST gate indicator;
17 – actual (current) flight altitude;
18 – target identification indicator (friend or foe);
19 – target indicator;
20 – number of the scanning lane (the scanning zone is divided into few lanes), on which the movement of the antenna currently occurs; [I think this means current scan line or bar]
21 – the command “PR” – missile launch permitted;
22 – the max and min range of missile launch;
23 – the range of target interception (lockon) by the radar;
(Translation thanks to Leszek from acig.org forums)
Compare these Su-27 displays with the MiG-31 display- interestingly similar….
The “own radar target” display is the same – a T shape, with targets numbered by threat priority to left. Targets taken from wingmen are marked with a triangle on the Su-27 display. I assume, following the Su-27 pattern, that the right hand number is the assigned interceptor from the group for that target. As this intercept is a lone MiG-31, the only number assigned is “1” for the most dangerous 4 targets.
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