Type 285 radar

The Type 285 radar was a British naval gunnery radar developed during the Second World War. The Type 285 was used as a surface and anti-aircraft ranging radar on smaller ships, and as an anti-aircraft radar on larger ships. ^[1] The prototype was tested at sea aboard the escort destroyer HMS Southdown in August 1940.^[2]

Type 285 radar

Country of origin	United Kingdom
Introduced	1940
Type	Fire-control radar
Frequency	600 MHz
Beamwidth	18° (horizontal) 43° (vertical)
Pulsewidth	2 μs
Range	18,000 yd (16,000 m)
Altitude	15,000 ft (4,600 m)
Precision	150 yd (140 m)
Power	25 kW

The Type 284 radar used the same electronics with a different antenna system, and was used for surface fire control on larger ships (cruisers and battleships).^[1]

Type	Aerial outfit	Peak power (kW)	Frequency (MHz)	Wavelength (cm)	In service
285		25	600	50	1941
285M		150	600	50	1941
285P		150	600	50	1942