Type 285 radar

{{Short description|British gun laying radar}}

{{Infobox radar

|image =

|caption =

|country = United Kingdom

|introdate = 1940

|number =

|type =Fire-control radar

|frequency =600 MHz

|PRF =

|beamwidth = *18° (horizontal)

• 43° (vertical)

|pulsewidth= 2 μs

|RPM =

|range = {{cvt|18000|yd|lk=in}}

|altitude = {{convert|15000|ft|m|abbr=on}}

|azimuth =

|elevation =

|precision = {{convert|150|yd|m|abbr=on}}

|power = 25 kW

|other names=

}}

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. {{Cite web |url=http://www.rnmuseumradarandcommunications2006.org.uk/RADAR%20IN%20THE%20RN%20AT%20THE%20END%20OF%20WW2.pdf |title=RADAR IN THE RN AT THE END OF WW2 |access-date=24 February 2025 |archive-url=https://web.archive.org/web/20150924091525/http://www.rnmuseumradarandcommunications2006.org.uk/RADAR%20IN%20THE%20RN%20AT%20THE%20END%20OF%20WW2.pdf |archive-date=24 September 2015 |url-status=dead }} The prototype was tested at sea aboard the escort destroyer {{HMS|Southdown|L25|6}} in August 1940.Campbell, p. 16

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).

class="wikitable" !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