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Heads-Up Display Modes 35 - Metaboli

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76 Radar Warning Receivers<br />

RADAR WARNING<br />

RECEIVERS<br />

Aircraft, ships, and ground stations broadcast radar signals everywhere searching<br />

for adversaries. Naturally, modern combat aircraft carry receivers designed to<br />

detect these emissions and warn pilots. Although Eastern and Western aircraft<br />

designers take slightly different approaches to the common problem, all radar<br />

warning receivers (RWRs) share some common aspects.<br />

First, RWR equipment is passive, meaning it emits no signals of its own. It<br />

“listens” for the emissions from other transmitters, indicating the type of<br />

transmitter, the bearing to the transmitter, and if the emitter has locked onto the<br />

aircraft. RWR gear, however, does not indicate the range to the emitter.<br />

hRWR equipment does not indicate the range to the transmitter.<br />

5.1 U.S. Aircraft<br />

The A-10 and F-15 radar warning receivers look slightly<br />

different, but operate virtually the same. In either<br />

aircraft, the center of the RWR represents your aircraft.<br />

The circular display represents the bearing around the<br />

plane; the top of the display indicates bearing 0 (directly<br />

ahead) while the bottom denotes bearing 180 (directly<br />

behind). The position of icons around the circle,<br />

therefore, indicates the bearing to the emitter.<br />

F-15 Radar Warning Receiver<br />

A-10 Radar Warning Receiver<br />

The screen presents icons in two<br />

rings. The rings indicate the relative threat presented by the<br />

radar sources, but do not indicate the range to the emitters.<br />

The outer ring shows radars in search mode; the inner ring<br />

displays radars that have locked onto your aircraft. A tone also<br />

sounds, providing an audible alarm when radar locks onto<br />

your aircraft. Icons representing incoming radar-guided<br />

missiles will flash.<br />

In the A-10, search and launch warnings are also indicated on the warning panel.<br />

Radar emitters are abundant on the modern battlefield. The RWR equipment can<br />

quickly become confusing, distracting, and even overwhelming as it displays the<br />

wide variety of contacts it detects. Consequently, the RWR supports three<br />

“declutter” levels:<br />

• Show All: Shows all detected radar sources.<br />

• Show Only Lock: Shows only radars locked onto your aircraft.<br />

• Show Only Launch: Shows only radar-guided missiles tracking your aircraft.

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