25.11.2014 Views

Heads-Up Display Modes 35 - Metaboli

Heads-Up Display Modes 35 - Metaboli

Heads-Up Display Modes 35 - Metaboli

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Sensors 73<br />

hYou cannot fire AIM-7 missiles when using TWS mode. You must<br />

designate the PDT or an SDT a second time and switch the radar to STT<br />

mode.<br />

Use TWS mode with caution. The radar cannot actually track multiple targets while<br />

scanning a large volume of airspace. Instead, the radar scans each target, predicts<br />

where the target will move to, searches a wider pattern, and then returns to scan<br />

the predicted position of each target. As long as the target flies a relatively<br />

consistent course, this system works fine; however, if the contact makes a<br />

sudden, aggressive course change, the radar will continue to show the predicted<br />

course until it completes enough of the scan cycle to realize it has lost contact<br />

with the target. The target may move a considerable distance unseen while the<br />

VSD continues to display the erroneous position.<br />

TWS is a powerful mode and necessary in order to fire multiple AIM-120 missiles<br />

at multiple targets. However, keep in mind its limitations and use it in conjunction<br />

with RWS and TWS modes.<br />

4.104 Home On Jam (HOJ) Mode<br />

If the radar detects a jamming signal, it displays a series of hollow rectangles<br />

along the bearing to the jammer on the VSD. If using AIM-7 or AIM-120 missiles,<br />

you may select and designate one of the Angle Of Jam (AOJ) rectangles. A<br />

vertical line appears through the AOJ markers and the VSD will display “HOJ”<br />

along the upper edge. Any AIM-7 or AIM-120 missiles will fly down the bearing of<br />

the jammer, attempting to locate the source.<br />

hThe AOJ markers only indicate the bearing to the jammer. It does not<br />

indicate the target’s speed, altitude, heading, or range.<br />

As you close on the jammer,<br />

eventually the reflections from<br />

your radar will be more powerful<br />

than the signals from the<br />

enemy’s jammer. This is called<br />

burn through and indicates your<br />

radar is powerful enough to<br />

overcome the jamming. Once<br />

you reach burn-through range,<br />

the contact will appear on the<br />

VSD, replacing the AOJ marks.<br />

HOJ display<br />

4.105 Vertical Search (VS) Auto-Acquisition Mode<br />

Vertical Search mode searches a fixed scan pattern 7.5° wide, ranging from 5°<br />

below the aircraft to 55° above. Range is fixed at 10 nautical miles. It<br />

automatically locks onto the target with the largest RCS within that pattern. After<br />

locking a target, the radar switches to STT mode.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!