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Rwanda Defence Force Command and Staff College National Security symposium 2022 | kigali, 18 May 2022| Photos by Moise Niyonzima
Irish Army Sniper teams practicing marksmanship skills in the Glen of lmaal.
Photos: Cpl Johhny Tuft
@irishdefenceforces
These were massive enough to feel Lord of the Rings like (Peter Jackson style).
Quite curious about that old rusted door...
Private Lee Stephens 30, from Solihull, has been hailed a hero after leaping from his vehicle to tackle a suspected suicide bomber
Presumably German Air Defences
Port Winston at Arromanches, the Mulberry harbour a British type of temporary harbour developed in World War II to offload cargo on the beaches during the Allied invasion of Normandy.
francemoblie.blogspot.com/2011/10/france-sep-2011-day-ele...
An Interclub competition between Nature Warriors, Bury Defence Academy and Accrington Wrestling Club was held at Accrington Academy on Saturday 17th Dec 2022.
Pictured in Arbroath Academy in July, 2004 was Mark Cooper SJN Marshall Arts Academy, coaching a class in self-defence and kick boxing.
There are lots of World War II anti-invations defences strewn along the beach below the cliffs, these include barbed wire picket screws, concrete blocks, these are smaller than standard and may been used for the Admiralty beach scaffolding or anti-boat landing obstacles, the normal anti-tank block size is approximately between 4ft and 5ft square (they may also be part of the sea defences that were built post war). There are a number of improvised concrete cylinders made from pouring concrete in to oil drums and inserting a bracket in the top, this was to link the cylinders together slowing down any advances made by the enemy.
This plaque was unveiled by The Rt. Hon. Sir Leon Brittan Q.C. Vice President Commission of European Communities
to commemorate the completion of new sea defences and cliff stabilisation works which were jointly funded by
European Regional Development Fund
Ministry of Agriculture, Fisheries and Food
North Yorkshire County Council
Scarborough Borough Council
9 September 1990
Cleveland Way near Mulgrave Road, Whitby
Masjid-E-Tooba is called the defence Mosque because the Pakistan Defence Officers Housing Society of Karachi contributed the money to build it.
Irish Army Sniper teams practicing marksmanship skills in the Glen of lmaal.
Photos: Cpl Johhny Tuft
@irishdefenceforces
Irish Army Sniper teams practicing marksmanship skills in the Glen of lmaal.
Photos: Cpl Johhny Tuft
@irishdefenceforces
Type 85 Radar Klystron (1967 – 1995)
This Klystron valve is of the type used in the Type 85 Air Defence Radar here at RAF Neatishead. There were 12 fitted to the radar. In normal use only 4 were in operation at any time.
A Klystron is an Amplifier taking small Radio Frequency signals and amplifying them before being fed to the Radar Aerial before transmission. This Klystron could operate at a peak power of over 5 MW. With all 12 in use, each ''pulse'' of energy produced was equivalent to the power of 75,000 domestic microwave ovens !
The Klystrons were housed in banks of cabinets in the Transmitter Hall. To keep them cool, the Klystrons were oil filled and water-cooled. Power output was calculated by means of the water temperature ! Fitted with quick release couplings, two men could quickly easily change replace a Klystron for maintenance.
Technical specification –
▪︎Operating frequency - 2.715 – 3.215 GHz
▪︎Peak power - 5 MW per Klystron, up to 8 MW in some Frequency Bands
▪︎Pulse duration - ųS
▪︎PRF - 250 pps.
The Type 85 radar was massive, it used up to 12 (normally 2) transmitters, each of up to 8 megawatts. It used klystrons as the transmitter amplifiers and so was frequency agile by simply changing the frequency of the inputs. It worked on four of the sub bands of the S band (A, B, D & E - the Type 80 used the C band). Each transmitter had numerous receivers – in such as linear, log and anti-jamming. Besides having anti-jamming receivers (similar to the Type 84), the Type 85 used its frequency agility to avoid the jamming, just before it was about to transmit it checked the receiver for jamming on that frequency and, if it found it, it shifted to a different frequency. The problem with this was that only the radar knew it was being jammed, this was eventually rectified.
The aerial sat on top of the main building on the site (known as the R12), and the hornstack set at the front of the reflector which was very similar to the Type 84 reflector. The waveguides had to be seen to be believed. Each of the waveguides went through a switching system and then went through a pressure vessel and then to the hornstack. The pressure vessel was the height of the building (two floors) and something like 8 feet across, it contained the rotating joints. The transmitters took up the whole of the ground floor and the receivers and other equipment about a third of the top floor.
The Type 85 mimic was light green in colour and the appropriate lamps would be lit when the T85 was in use and showed which transmitter and which horns etc. were being used. Starting at the left are the frequency generators which feed all six of the band A and D amplifiers and transmitters, the B and E frequency generators and transmitters being at the right. From the amplifier and transmitter blocks are shown all the waveguide switching possible, the relevant run of lamps being lit for each configuration at the time. Right at the top are shown the horns, and below those is shown the pressure vessel. The mimic was said to be a variation of Westinghouse railway signalling mimics. Under normal circumstances, only two transmitters would be in use (the top ones on the mimic) and in that configuration, they each tranmitted into six of the horns using power splitting in the switches.
In 1968, the NATO defence policy was changed to one of 'flexible response'. In the UK an entirely different air defence radar system was needed, with grater emphasis placed on hardening of the control elements, an enhanced flexibility in the deployment of radars to circumvent pre-targeting. Thus IUKADGE (Improved UK Air Defence Ground Environment) came into being during the 1980's, to replace LINESMAN; the radar sites were once again sited around the UK coast, and digitally linked in to the Command Centre.
Information sourced from — www.blunham.com/Radar/Me/index.html
Saw this on a walk around Lisburn. The memorial is excellent gesture in recognition of the brave men and women of the UDR
An Interclub competition between Nature Warriors, Bury Defence Academy and Accrington Wrestling Club was held at Accrington Academy on Saturday 17th Dec 2022.
Members of the Irish Defence Forces during taking part in a MOUT training exercise as part of the 59th PNCO Course.
Photos: 105 Sqn Photographic and Airborne Imagery
British Civil Defence representative Nicholas Ridsdale came from York to pay his respects to those who lost their lives in the tragedy. It was the third time he had attended the ceremony
Photograph by Helen Varley
banda: in defence (usa)
sala: cso putzuzulo amets fabrika
ciudad: zarautz
fecha: 09·10·2009
myspace: www.myspace.com/indefence
A nice cluster of anti-tank obstacles and pillboxes on the south coast of the Isle of Grain near Hoo St Werbergh.
Irish Army Sniper teams practicing marksmanship skills in the Glen of lmaal.
Photos: Cpl Johhny Tuft
@irishdefenceforces