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Radar System Engineering

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SEC. 8.1] TYPES OF RADAR-BEACON SYSTEMS<br />

249<br />

3. Airborne beacons. This combination has been useful as an aid in<br />

effecting rendezvous and for identification.<br />

4. Portable beacons. Such a combination has been of military use<br />

under circumstances where fixed ground beacons could not be set<br />

up readily, but small portable beacons could be used instead.<br />

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FIG. S..5. -Tbe AN/I’PX-2 beacon<br />

The AN/PPN-2 is a 1.5-nl beacon designedfor<br />

useprincipally by paratroops.<br />

FIG, 8.6,—The .$N/UPN-l, a portable<br />

bnttery-operated10-cmbeacon.<br />

Such beacons have been used principally to indicate to supporting<br />

aircraft the location of isolated forward elements on the ground,<br />

such as advance parties of paratroops or secret agents.<br />

Figure<br />

8.5 shows the AN/PPN-2, a 1.5-m beacon carried by pathfinder<br />

paratroopers; Fig. 8.6 shows the AN/UPX-l, a 10-cm beacon that<br />

was similarly used. Similar beacons have been used for marking<br />

life rafts at sea.

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