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EARLY WARNING SITE |
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| SN | A site, building or structure used for the detection of approaching hostile aircraft, shipping or missiles early enough to allow a counterattack or defensive measures to be taken. Use more specific term. |
| CL |
MILITARY DEFENCE AND FORTIFICATION |
| BT | DEFENCE SITE |
| NT |
ANTENNA ARRAY
EARLY WARNING STATION ROYAL OBSERVER CORPS SITE SONAR STATION SOUND MIRROR SOUND MIRROR BUILDING |
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