This appears to be the last surviving chapter of a series of classified training films made for the Royal Navy in 1943, detailing the workings of radar systems in a variety of roles, including search, anti-aircraft and fighter direction.

Titled "RADIOLOCATION (RDF) PART 7 : Operational use of Type Nos 273M and 284M in a cruiser", the film walks viewers through an unnamed Royal Navy Town Class cruiser's new surface gunnery radar technology and techniques.

It explains the abilities and roles of the associated radar sets, but also demonstrates the command network established aboard the ship to effectively apply this new technology to gunnery rangefinding and control.

This training documentary was produced by the Admiralty in conjunction with British Thomson-Houston (B-TH) - a British engineering and heavy industrial company specialising in naval electrical equipment, based at Rugby, Warwickshire, England.