Thesaurus Term/Concept: PICKETT HAMILTON FORT
| Identifier | 123500 |
|---|---|
| Class | DEFENCE OF BRITAIN |
| Status | Preferred |
| Index? | Yes |
| Scope Note | A sunken, circular, concrete pillbox used on airfields. They remained flush with the surface to permit the free movement of aircraft, but if attack threatened, could be raised, hydraulically or by a counterbalance, and manned to give covering fire. |