Projector Searchlight 90CM Mark VI

Searchlights were used to illuminate enemy aircraft at night. They saw little use at the start of the Battle of Britain but became important once night raids started on Britain's towns and cities.

Searchlights were used to show anti-aircraft guns and RAF night fighters where German aircraft could be found. There was a danger, however, that they would dazzle RAF pilots. Searchlights and anti-aircraft guns were operated by Territorial Army units of Anti-Aircraft Command.