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Trigpoint: Portsdown Hill East

Portsdown Hill East 116m (381ft)

Classification: Trigpoint.
OS Grid Ref: SU641067 (10 figure Grid Ref: SU6417106726).
Latitude: 50, Longitude: -1, Height: 116 metres (381 feet)
Site ID: TP4891

External Links for Trigpoint 'Portsdown Hill East':
-GeoHack link... -OS Map Bing link... -Google Map link... -Geograph link... -Portsdown Hill East on

Trigpoint data contributed by John Davis

Selected mapping: Google or Bing / Ordnance Survey

Map Legend: :Trigpoints | :Nearby Hill | :Nearby Trigpoint


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  • 'TP4891' SU641067 Portsdown Hill East (116m)*
  • * This Trigpoint may have been reported missing or destroyed

Member's Comments...

  • jonglew says...
  • Not showing on OS database as destroyed, but not seen for at least 30 years so assume it's gone
  • Chris Pearson says...
  • The high security site houses QinetiQ/BAe System's land based Type 45 warship radar mock up.These modern Type 45 warship destroyers are primarily designed for anti-air warfare with the capability to defend against sophisticated targets such as fighter aircraft, drones as well as highly maneuverable sea skimming anti-ship missiles travelling at supersonic speeds. The Royal Navy describes the destroyers' mission as being "to shield the Fleet from air attack".The Type 45 destroyer is equipped with the sophisticated Sea Viper air-defence system which is able to track over 2,000 targets and simultaneously control and coordinate multiple missiles in the air at once, allowing a large number of tracks to be intercepted and destroyed at any given time. This makes the system particularly difficult to swamp during a saturation attack, even against supersonic targets.It is capable of tracking 1,000 objects the size of a cricket ball travelling at three times the speed of sound (Mach 3), emphasising the system's capabilities against high performance stealth targets.(So razor wire permitting probably quite tricky to sneak in "under the radar" here if intent on visiting the site of the former trig).
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This Trigpoint has been visited by...

Chris Pearson cjo Dugswell2 Griefmiester jonglew Konnor64 oakesave rhayader_wanderer rhw


Total = 1 Trigpoints, including 1 reported missing or destroyed


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