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Heads-Up Display Modes 35 - Metaboli

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56 <strong>Heads</strong>-<strong>Up</strong> <strong>Display</strong> <strong>Modes</strong><br />

Depending upon which mode you are operating (BVR, CAC), the method of<br />

selecting or designating that contact differs, but the end result is the same: The<br />

radar/EOS will automatically track the aircraft contact, hence the term “auto-track.”<br />

In common language, this is called “the lock.” The radar/EOS receives all the<br />

necessary contact parameters from the Weapons Control System to smoothly<br />

move the antenna in the direction of flight for the contact. The following<br />

parameters are available on the HUD while the radar is in auto-track:<br />

• Aspect angle relative to user aircraft<br />

• Azimuth/Elevation relative to user aircraft<br />

• Distance relative to user aircraft<br />

• Speed of contact<br />

The radar tracking area for a single target is 120° x 120° in elevation and in<br />

azimuth, and tracking range for a medium-sized target is from 55 km (rear<br />

hemisphere) to 100 km (forward hemisphere for large aircraft). When operating in<br />

Attack mode, the radar provides target designation for guided missiles, illuminates<br />

targets for missiles fitted with SARH seekers, and provides initial guidance data<br />

for active missiles.<br />

If you use the EOS, the tracking area coincides with its field of search and<br />

equals 75° in elevation (15° down, 60° up) and 120° in azimuth. Tracking range<br />

depends on the type of target, strength of the heat signatures, and the attack<br />

hemisphere. The EOS laser rangefinder measures distances to the target for<br />

ranges from 0.2 to 3 km, with an accuracy of 10 meters and from 3 to 5 km<br />

with an accuracy of 25 m.<br />

After the radar (EOS) has locked onto the target, the HUD shows the following<br />

information: the "À" Autotrack Cue, the range scale with the minimum and<br />

maximum launch range marks, the range-to-target mark, and the target aspectangle<br />

arrow. The HUD also displays the Aiming Reticle, altitudes and true<br />

airspeeds of your aircraft and of the target, the aircraft datum and bank scale,<br />

current combat mode, type of missile, quantity of missiles, and missile flight time.<br />

The target’s position is shown on the HUD as a point (the Target Marker) in<br />

angular coordinates scaled to the dimensions of the tracking area (see the figure<br />

below).<br />

Target Airspeed<br />

Your Airspeed<br />

5 Km Range Scale<br />

Target Range<br />

Target Aspect<br />

Weapon Minimum Range<br />

Marker<br />

Weapon Type<br />

Master Mode<br />

Autotrack Symbology with Radar Lock<br />

Target Altitude<br />

Your Altitude<br />

Target<br />

Aircraft Datum<br />

Shoot Cue<br />

Autotrack Submode<br />

Weapon Quantity<br />

Green lights on the weapon readiness panel indicate which missiles at each<br />

weapon station are ready for launch. The MFD displays a top-down view of the<br />

target, its aspect angle, and distance information about the target. When you are<br />

tracking the target using the radar, target information may disappear for some<br />

time if the target deploys ECM or decoy countermeasures.

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