Thesaurus Term/Concept: SIGNAL SQUARE
| Identifier | 140791 |
|---|---|
| Class | DEFENCE OF BRITAIN |
| Status | Preferred |
| Index? | Yes |
| Scope Note | A signalling structure used on WWII airfields, comprising a concrete square base with a kerbed border into which concrete signal symbols could be placed to advise pilots in the air of current airfield state e.g. directions of landing and airfield circuit. |