Friday, August 31, 2018

●● Defence & Infrastructure ◊

⧫ Alliances, Trade - 21st ..
⧫ Budgets ..
⧫ MILDEC - Military Deception ..
⧫ Wargaming, Hypothetical Warfare ..

A2/AD - Anti-Access/Area Denial 
A2/AD ..

Air Defenses 
Aegis Combat System ..

Citizens, 21st
Fort Drum, Manila Bay ..
German defences ..
Hindenberg/Siegfried Line WW1 ..
Ostwall ..
Red Sand Sea Towers ..
Siegfried Line (1939) - Germany's Western Defences ..

Defensive Shelters 

Defensive Systems 

Detecting Threat 

Deterrence 

DIME

Drones 

Electrical Grid 

Firefighting  

Geostrategic Projection
European Geostrategic Projection ..


Marine/Submarine Infrastructure

Military

Rescue 

Resistance

Space

Tuesday, August 28, 2018

A2/AD

22-3-25 A2/AD: A Strategy for Defence of Australia in 21st Century - H³ > .
23-10-14 [Independent Taiwan versus Imperialist Dicktatorship] - Real > . 
23-10-4 Taiwan requests Total Life Systems Management & defensive weapons - Up > .
>> >>

Anti-Access/Area Denial (or > A2/AD >>) is [an asymmetric] military strategy to control access to and within an operating environment. In an early definition, anti-access refers to those actions and capabilities, usually long-range, designed to prevent an opposing force from entering an operational area. Area denial refers to those actions and capabilities, usually of shorter range, designed to limit an opposing force's freedom of action within the operational area. In short, A2 affects movement to a theater, while AD affects movement within a theater. A2/AD typically refers to a strategy used by a weaker opponent to defend against an opponent of superior skill, although a stronger opponent can also use A2/AD.

Acoustic Locators & Sound Mirrors

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No Radar? No Problem! > .
Cavity Magnetron - Device that Won WW2 - CuDr > .
Bizarre Origins Of Radar Technology | Secrets Of War | Timeline > .

Acoustic location is the use of sound to determine the distance and direction of its source or reflector. Location can be done actively or passively, and can take place in gases (such as the atmosphere), liquids (such as water), and in solids (such as in the earth).
  • Active acoustic location involves the creation of sound in order to produce an echo, which is then analyzed to determine the location of the object in question.
  • Passive acoustic location involves the detection of sound or vibration created by the object being detected, which is then analyzed to determine the location of the object in question.
Both of these techniques, when used in water, are known as sonar; passive sonar and active sonar are both widely used.

Acoustic mirrors and dishes, when using microphones, are a means of passive acoustic localization, but when using speakers are a means of active localization. Typically, more than one device is used, and the location is then triangulated between the several devices.

As a military air defense tool, passive acoustic location was used from mid-World War 1 to the early years of World War 2 to detect enemy aircraft by picking up the noise of their engines. It was rendered obsolete before and during World War 2 by the introduction of radar, which was far more effective (but interceptable). Acoustic techniques had the advantage that they could 'see' around corners and over hills, due to sound diffraction.

Aegis Combat System

23-11-30 Guided Missile Destroyers: Aegis, Radar, Missile Launchers | WSJ > .

The Aegis Combat System is an American integrated naval weapons system, which uses computers and radars to track and guide weapons to destroy enemy targets. It was developed by the Missile and Surface Radar Division of RCA, and it is now produced by Lockheed Martin.

Aegis BMD (Ballistic Missile Defense) capabilities are being developed as part of the NATO missile defense system. Initially used by the United States Navy, Aegis is now used also by the Japan Maritime Self-Defense Force, Spanish Navy, Royal Norwegian Navy, Republic of Korea Navy, and Royal Australian Navy, and is planned for use by the Royal Canadian Navy. As of 2022, a total of 110 Aegis-equipped ships have been deployed, and 71 more are planned (see operators).


Air-raid shelters

Gresford, 1939

When Wilkinson's Lemonade factory in North Shields received a direct hit on Saturday, 3 May 1941 during a German attack on the north-east coast of England, 107 occupants lost their lives when heavy machinery fell through the ceiling of the basement in which they were sheltering.
.......
Many other types of tunnels were adapted for shelters to protect the civil population, and the military and administrative establishment in the UK during the war. Some had been built many years before, some had been part of an ancient defence system, and some had belonged to commercial enterprises, such as coalmining.

The Victoria tunnels at Newcastle upon Tyne, for example, completed as long ago as 1842, and used for transporting coal from the collieries to the river Tyne, had been closed in 1860 and remained so until 1939. 12 m deep in places, the tunnels, stretching in parts beneath the city of Newcastle, were converted to air raid shelters with a capacity for 9,000 people. Furthermore, tunnels linked to landing stages built on the River Irwell in Manchester at the end of the 19th century were also used as air-raid shelters.

The large medieval labyrinth of tunnels beneath Dover Castle had been built originally as part of the defensive system of the approaches to England, extended over the centuries and further excavated and reinforced during World Wars I and II, until it was capable of accommodating large parts of the secret defence systems protecting the British Isles. On 26 May 1940 it became the headquarters under Vice Admiral Bertram Ramsay of “Operation Dynamo”, from which the rescue and evacuation of up to 338,000 troops from France was directed.

In Stockport, six miles south of Manchester, four sets of underground air raid shelter tunnels for civilian use were dug into the red sandstone on which the town centre stands. Preparation started in September 1938 and the first set of shelters was opened on 28 October 1939. (Stockport was not bombed until 11 October 1940.) The smallest of the tunnel shelters could accommodate 2,000 people and the largest 3,850 (subsequently expanded to take up to 6,500 people.) The largest of the Stockport Air Raid Shelters are open to the public as part of the town's museum service.

In southeast London, residents made use of the Chislehurst Caves beneath Chislehurst, a 22-mile-long (35 km) network of caves which have existed since the Middle Ages for the mining of chalk and flint.
.......
Prior to the beginning of the war, shelter policy had been determined by Sir John Anderson, then Lord Privy Seal and, on the declaration of war, Home Secretary and Minister of Home Security. Anderson announced the policy to Parliament on 20 April 1939, based on a report from a committee chaired by Lord Hailey. This reaffirmed a policy of dispersal and eschewed the use of deep shelters, including the use of tube stations and underground tunnels as public shelters. Reasons given were the spread of disease due to the lack of toilet facilities at many stations, the inherent danger of people falling onto the lines, and that people sheltering in the stations and tunnels might be tempted to stay in them day and night because they would feel safer there than outside the stations.

None of these concerns had been borne out by experience during the bombing raids of the First World War, when eighty specially adapted tube stations had been pressed into use, but in a highly controversial decision in January 1924, Anderson, then chairman of the Air Raid Precautions Committee of Imperial Defence and had ruled out the tube station shelter option in any future conflict.

Following the intensive bombing of London on 7 September 1940 and the overnight raids of 7/8 September, there was considerable pressure to change the policy but, even following a review on 17 September, the Government stood firm. On 19 September, William Mabane, parliamentary secretary to the Ministry of Home Security, urged the public not to leave their Anderson shelters for public shelters, saying it deprived others of shelter. "We're going to improve the amenities in existing shelters," he promised. "We're setting about providing better lighting and better accommodation for sleeping and better sanitary arrangements." The Ministries of Home Security and Transport jointly issued an "urgent appeal", telling the public "to refrain from using Tube stations as air-raid shelters except in the case of urgent necessity".

However, the Government was then confronted with an episode of mass disobedience. Over the night of 19/20 September, thousands of Londoners were taking matters in their own hands. They had flocked to the Tubes for shelter. At some stations, they began to arrive as early as 4pm, with bedding and bags of food to sustain them for the night. By the time the evening rush hour was in progress, they had already staked their "pitches" on the platforms. Police did not intervene. Some station managers, on their own initiatives, provided additional toilet facilities. Transport Minister John Reith, and the chairman of London Transport, Lord Ashfield, inspected Holborn tube station to see conditions for themselves.

The Government then realised that they could not contain this popular revolt. On 21 September, it abruptly changed policy, removing its objections to the use of tube stations. In what it called part of its "deep shelter extension policy", it decided to close the short section of Piccadilly line from Holborn to Aldwych, and convert different sections for specific wartime use, including a public air raid shelter at Aldwych. Floodgates were installed at various points to protect the network should bombs breach the tunnels under the Thames, or large water mains in the vicinity of stations. Seventy-nine stations were fitted with bunks for 22,000 people, supplied with first aid facilities and equipped with chemical toilets. 124 canteens opened in all parts of the tube system. Shelter marshals were appointed, whose function it was to keep order, give first aid and assist in case of the flooding of the tunnels.


London Underground station in use as an air-raid shelter during World War II.
Businesses (for example Plessey Ltd) were allowed to use the Underground stations and unopened tunnels, government offices were installed in others and the anti-aircraft centre for London used a station as its headquarters.

However, tube stations and tunnels were still vulnerable to a direct hit and several such incidents did occur:

On 14 October 1940, a bomb penetrated the road and tunnel at Balham tube station, blew up the water mains and sewage pipes, and killed 66 people.

At Bank station a direct hit caused a crater of 120 ft by 100 ft on 11 January 1941, the road above the station collapsed and killed 56 occupants.

However, the highest death toll was caused during an accident at the unfinished Bethnal Green tube station on 8 March 1943, when 1,500 people entered the station. The crowd suddenly surged forwards on hearing the unfamiliar sound of a new type of anti-aircraft rocket being launched nearby. Someone stumbled on the stairs, and the crowd pushing on, were falling on top of one another, and 173 people were crushed to death in the disaster.

Nevertheless, the London Underground system during the war was considered one of the safest means of protecting relatively many people in a high-density area of the capital. An estimated 170,000 people sheltered in the tunnels and stations during World War II. Although not a great number in comparison to the total number of the inhabitants of the capital, it almost certainly saved many lives of the people who probably would have had to find alternative, less secure means of protection.

Artists and photographers such as Henry Moore and Bill Brandt[13] were employed as war artists to document life in London's shelters during the Second World War.
.......
A segment shelter manufactured by the Stanton Ironworks, Ilkeston, Derbyshire. The shop producing spun-concrete lighting columns ceased production and turned over to concrete air-raid shelters, of which 100,000 tons were manufactured, principally for the air ministry. Reinforced concrete proved an ideal material for air-raid shelters, being strong and resistant to shock with no deterioration with the passing of time. This type of segment shelter was of simple design and of low cost—any length of shelter could be built up from the pre-cast steel reinforced concrete segments. The segments were 20 inches wide; a pair of them formed an arch 7 feet high and transverse struts were provided to ensure rigidity. These fitted into longitudinal bearers which were grooved to receive the foot of each segment. Each pair of segments was bolted together at the apex of the arch and each segment was also bolted to its neighbour, the joints being sealed with a bituminous compound. The convenient handling of these segments enabled them to be transported onto sites where close access by motor lorry was not possible. Partly buried in the ground, with a suitably screened entrance, this bolted shelter afforded safe protection against blast and splinters.

https://en.wikipedia.org/wiki/Air_raid_shelter#United_Kingdom

Atlantikwall

Atlantikwall

Atlantic Wall (D-Day) - Example of a Coastal Defense Position - Atlantikwall > .

Atlantikwall - Channel Islands

Hitler's Sea Wolves - The Granville Raid out of Channel Islands, 1945 > .


Atlantikwall
Atlantikwall ..
Atlantikwall - Channel Islands ..

ARP - shelters

Beneath Clapham South Tube station lie a warren of tunnels which provided shelter for 8,000 people during World War Two.

After the war, the dormitories in south London became temporary accommodation for immigrants from countries like Jamaica who were invited to live in the UK. The tunnels, which are 120ft below the surface, have now been opened up for public visits by Transport for London (TfL) and the London Transport Museum.

Monday, August 27, 2018

Barrage Balloons

Barrage Balloons ..
Cardington - airships, barrage balloons .. 

RAF Cardington

The UK had a rigid airship program during WW1. This required the big construction sheds in Barrow-in-FurnessInchinnanBarlow and Cardington, and the rigid airship war stations at Longside, East FortuneHowdenPulham (Norfolk) and Kingsnorth.

Dimensions of Cardington shed:
Length: 812 ft (247m)
Width: 275 ft (84m) total, clear width is 180 ft (54.9m)
Height: 180 ft (55m) total, clear height is 157 ft (47.9m)

Works, in Cardington, Bedfordshire remain, where the R101 was built. The No.1 Cardington hangar is original, but extended; the No.2 hangar was relocated to Cardington from Pulham in 1928.

In 1924, the Imperial Airship Communications scheme planned to extend mail and passenger service to British India, so an 859-foot hangar was constructed at Karachi (now in Pakistan) in 1929. This was the intended destination of the R101. --
Hx RAF CardingtonThe facility was built by aircraft manufacturing company Shorts Brothers to build airships for the Admiralty. Shed 1 (700ft / 210m long) was built in 1915 to enable it to build two rigid airships, the R-31 and R-32. A housing estate was also constructed opposite the site, and named Shortstown.

The airships site was nationalised in April 1919, becoming known as the Royal Airship Works.

In preparation for the R101 project the No 1 shed was extended between October 1924 and March 1926; its roof was raised by 35 feet and its length increased to 812 feet. The No. 2 shed (Southern shed), which had originally been located at RNAS Pulham, Norfolk, was dismantled in 1928 and re-erected at Cardington.

After the crash of the R101, in October 1930, all work stopped in Britain on airships. Cardington then became a storage station.

In 1936/1937 Cardington started building barrage balloons; and it became the No 1 RAF Balloon Training Unit responsible for the storage and training of balloon operators and drivers. In 1943 until 1967 it was home to the RAF Meteorological research balloons-training unit, undertaking development and storage (after 1967 this was undertaken by the Royal Aircraft Establishment).

For both airships and barrage balloons, Cardington manufactured its own hydrogen, in the Gas Factory, using the steam reforming process. In 1948 the Gas Factory became 279 MU (Maintenance Unit), RAF Cardington; and then, in 1955, 217 MU. 217 MU, RAF Cardington, produced all the gases used by the Royal Air Force until its closure in April 2000; including gas cylinder filling and maintenance.

The two airship sheds ceased being part of the RAF Cardington site in the late 1940s and they were put to other uses. The fence was moved, so they were outside the main RAF Cardington site. --
In 1921, Cardington became the Royal Airship Works and R38 had its first flight here. Interest in airships was renewed in 1924 and two new ones were commissioned — R100 by Barnes Wallis (built at Howden) and R101 built at Cardington.

Shed No.1 had to be enlarged to construct R101, which was 223m long and a little over 40m in diameter. The work was done in 1926-7. The shed was lengthened, the base A-frames widened and the roof was raised.

In 1928, an airship hanger at Pulham in Norfolk was dismantled and moved to Cardington and re-erected as Shed No.2 to house R100.

R101 was launched on 12th October 1929. It was to have a sad end, as it crashed in France in October 1930, killing most of those on boardR100 was broken up a year later. This brought airship development in Britain to an end until the 1970s, when when smaller more manoeuvrable craft were developed at Cardington.

The demise of the R101 in 1930 killed off the government's plans for the Empire Communications Scheme. They had envisaged airship coverage of outlying locations in the British Empire for mail and passenger services. The proposed destinations were to include the UK, Canada, Egypt and India. Facilities were built in these countries in readiness for a service that never really got off the ground. Cardington had been the designated UK operations base.

The sheds are constructed of steel portal frames with pin joints at the crown and in the side walls. The doors were originally capstan operated but now there are powered doors on transverse tracks. Shed No.2 is in the better condition, having had repairs done to it in the 1970s and in 1986.

For many years the sheds housed part of the RAF Museum. More recently, Shed No.2 was used by the Building Research Establishment for tests, including the full-scale load & fire testing of multi-storey buildings.
http://www.engineering-timelines.com/scripts/engineeringItem.asp?id=514 .
https://en.wikipedia.org/wiki/Cardington_Airfield .
https://en.wikipedia.org/wiki/Airship_hangar .
http://cardington.weebly.com/ .

http://dunkirk1940.org/index.php?&p=1_315
http://www.17balloons.co.uk/pages/Appendix-d.html
https://a2asimulations.com/forum/viewtopic.php?f=10&t=48404

WWI
http://mashable.com/2016/03/02/wwi-balloons/#Y4giyGlqn8qS

Waterborne balloons on rafts had been successful in Italy prior to World War One when the Austrians and the Italians were at war. The concept was expanded to various powered boats (unlike the rafts / pontoons of WWI days).

The military classed these as auxiliary fighting vessels and were made up of two distinct groups:

1. Sea-going vessels that accompanied convoys usually comprising of small mercantile vessels and tugs

2. In harbours and estuaries drifters, barges, and trawlers were used. The vessels sailed to a suitable location, anchored, and then raised the balloon to deter enemy aircraft from attacking vulnerable locations, such as docks. Trawlers and Drifters were often commandeered by the military to be adapted to fly barrage balloons.

All of them needed a flat deck area big enough to bed a balloon down and a winch that could be operated with relative ease for hauling down and letting up the balloon.

The vessels were manned by a naval crew who dealt with all the nautical aspects, and a small group of RAF men who dealt with the flying and maintenance of the balloon. Some aspects were overlapping and it seems the crews worked very well together as a team. Food was brought out to them by small boats and if the weather was very rough then they might not get fed for many hours.

German aircraft dropped sea-mines into the ocean in an attempt to sink shipping. In order for the mines to be most effective it was necessary for the German aircraft to fly very low. Using balloons as a defence was very effective as German aircraft found the targets they wanted to drop the mines in were well protected by balloons and they could not fly low enough to hit the target that they wanted to.

So estuaries and river mouths were often prime locations for the balloon vessels.
http://www.bbrclub.org/Barrage%20Balloon%20Vessels.htm

Beach Defences

40-7-2 Brighton Beach closed, mined, barbed wire installed > .

Britain's Early Defences - WW2

.Britain - Roughest Parts of WW2, Preparations for Defence - Front >skip ad > .

0:00 Introduction
2:31 The Fall of France and Dunkirk
4:26 Rationing and the pet massacre
6:55 The Battle of the Atlantic
8:02 The Battle of Britain and the Blitz
9:26 The Home Guard and Auxiliary Units
10:42 Was Britain close to falling?

Bunkers

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Britain’s Vast Network of Abandoned Nuclear Bunkers | Cold War UK - Calum > .

Saturday, August 25, 2018

Defence of the Reich - Reichsverteidigung

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The Defence of the Reich (Reichsverteidigung) is the name given to the strategic defensive aerial campaign fought by the Luftwaffe over German-occupied Europe and Nazi Germany during World War II. Its aim was to prevent the destruction of German civilians, military and civil industries by the Western Allies. The day and night air battles over Germany during the war involved thousands of aircraft, units and aerial engagements to counter the Allied strategic bombing campaign. The campaign was one of the longest in the history of aerial warfare and with the Battle of the Atlantic and the Allied Blockade of Germany was the longest of the war. The Luftwaffe fighter force defended the airspace of German-occupied territory against attack, first by RAF Bomber Command and then against the United States Army Air Forces (USAAF).

In the early years, the Luftwaffe was able to inflict a string of defeats on Allied strategic air forces. In 1939, Bomber Command was forced to operate at night, due to the extent of losses of unescorted heavy bombers flying in daylight. In 1943, the USAAF suffered several reverses in daylight and called off the offensive over Germany in October. The British built up their bomber force and introduced navigational aids and tactics such as the bomber stream that enabled them to mount larger and larger attacks with an acceptable loss rate. However, the USAAF introduced the P-51 Mustang, a fighter capable of escorting the USAAF bombers to and from their targets in daylight. With new fighter tactics, the Eighth Air Force gained air supremacy over Nazi Germany by the spring of 1944 against the Luftwaffe.
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From January 1942 to April 1943, German arms industry grew by an average of 5.5% monthly, and by summer 1943, the systematic attack against German industry by Allied bombers, brought the overall armament production — during the period of May 1943 to March 1944 — to a complete halt. At the ministerial meeting in January 1945, Albert Speer noted that, since the intensification of the bombing began, 35 percent fewer tanks, 31 percent fewer aircraft and 42 percent fewer lorries were produced as planned and as a direct result of the bombing. The German economy had to switch vast amount of resources away from equipment for the fighting fronts and assign them instead to combat the bombing threat. The intensification of night bombing by the RAF and daylight attacks by the USAAF added to the destruction of a major part of the German's industries and cities, which caused the economy to collapse in the winter of 1944–45. By this time, the Allied armies had reached the German border and the strategic campaign became fused with the tactical battles over the front. The air campaign continued until April 1945, when the last strategic bombing missions were flown and it ended upon the capitulation of Germany on 8 May.
https://en.wikipedia.org/wiki/Defence_of_the_Reich .
.......
Kammhuber Line ..  
Kammbuber Line & German Radar > .
.......

German air doctrine had seen little need for the development of an nocturnal night air defence system and the Luftwaffe concentrated on the offensive use of air power. However, the failure of the Luftwaffe in the Battle of Britain in 1940 ended hopes for an early victory and forced the continuance of hostilities with the British Empire. Faced with German domination of the continent, the only weapon the British could use to exert immediate military pressure on Germany was the night bombing operations of RAF Bomber Command.

Boundary map drawn up by the Luftwaffe in 1940. It remained unchanged for the duration of the war. Intruders were to patrol the areas.

Bomber Command had been forced to operate at night since December 1939 and the Battle of the Heligoland Bight when debilitating losses in daylight forced the RAF to abandon these operations. These raids, though inaccurate and wholly ineffective, were causing embarrassment to the Commander-in-Chief of the Luftwaffe and the second most powerful man in Germany, Reichsmarschall (Imperial Marshal) Hermann Göring, who had once boasted "You may call me Meyer" if enemy bombers ever flew over Germany. He ordered the creation a new force set up on 26 June 1940, to combat the night raids.

Göring appointed a respected and experienced pilot, Geschwaderkommodore (Wing Commander) Wolfgang Falck to develop a new organisation and consequently Falck founded Nachtjagdgeschwader 1 (Night Fighter Wing 1 or NJG 1). Within a year four more Geschwader (Wings) were founded; Nachtjagdgeschwader 2 (NJG 2), NJG 3 (NJG 3), and NJG 4 (NJG 4). All of these units were in existence by April 1941.[13] In order to improve the management of the expanding night fighter force, the Erste Nachtjagd Division (1st Night Fighter Division) was established on 17 July 1940, commanded by Oberst (Colonel) Josef Kammhuber. An aggressive commander, Kammhuber founded the Fernnachtjagd, or long-range night fighter intruder force. The nucleus of this force was derived from I./NJG 2 which would remain the only intruder unit.

The Germans quickly developed a series of basic tactics for intercepting enemy intruders. The lack of airborne radar at this stage in the war meant finding and destroying Allied bombers at night was a difficult prospect, thus it was decided to use the Fernnachtjagd in operations over Britain. Major Kuhlmann, head of the wireless telegraphy interception service played a significant part in assisting the Luftwaffe night fighter force as did Wolfgang Martini's Luftnachrichtentruppe (Air Signal Corps). Intercepting British signal communications by monitoring the radio traffic of enemy ground stations and aircraft the Germans could determine where and at what airfields RAF night activity was occurring. With the British base identified Falck could then move against them over their own airfields. Three waves could then be deployed; one to attack the bombers as they took off, one to cover the known routes taken by the enemy over the North Sea, and the third to attack them on landing at a time when, after a long flight, enemy crews were tired and much less alert. For operational purposes, Eastern England was divided into four regions or Räume (areas). Raum A was Yorkshire, bounded by Hull, Leeds, Lancaster and Newcastle. Raum B covered the Midlands and Lincolnshire whilst Raum C encompassed East Anglia bounded by London Peterborough, Luton and The Wash. Operations began in earnest in October 1940.

While sound in theory, it proved much more difficult in practice. Inexperience told and by December 1940 NGJ 2 had lost 32 aircrew killed in action and 12 aircraft lost in exchange for 18 RAF aircraft claimed shot down. Despite the claims made by German crews, evidence showed a considerable amount of over claiming, and the difficulty in substantiating claims at night and over enemy territory became evident.

In 1941, the German night fighter intruders began achieving substantial successes. British ground defences, which had taken their toll on the German units in 1940, were now side-stepped by a decision to shift the area of operations to the North Sea, by the English coast. In June German night fighter units claimed 22 RAF aircraft; 18 over the sea. In July 19 British aircraft were claimed for four losses. By October 1941 British loss records listed 54 aircraft of all types destroyed and a further 44 damaged in these operations to all causes. German losses amounted to 27 destroyed and 31 damaged to all causes.

While the number of losses incurred against German night fighters was not significantly large the psychological damage was substantial. A high number of crashes owed much to nervous British bomber pilots who did not feel safe over their own airfields and consequently landed too hard and fast or refused to go around a second time for fear of enemy intruders. Just as it appeared night intruder sorties were showing promise Adolf Hitler ordered a cessation of operations. For propaganda purposes, he thought that the morale of the German people would be better served by seeing British bombers destroyed and wrecked over German territory. Hitler was also reticent owing the fact there had been no noticeable reduction in British air raids and the RAF had not adopted these methods during The Blitz. This order came into effect on 12 October 1941. Kammhuber would unsuccessfully lobby to have intruder operations reinstated and his efforts to expand the intruder force beyond a single unit were thwarted by an uninterested High Command which was inundated with requests for reinforcements in other theatres.


German Defense from Norway to Greece > .

Defence of the Reich - Reichsverteidigung ..

Atlantikwall

Defending Against Sealion

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How RAF Prepared For Luftwaffe's Offensive | Battle Of Britain | Timeline > .

Defences - structures

18-6-8 The WW2 Towers That Defeated the Soviets > .

Atlantikwall ..
Atlantikwall - Channel Islands ..
Beach Defences ..
Coastal Defence ..
Defences ..
Defence of the Reich - Reichsverteidigung ..
German Defences ..
Maginot Line ..
Ostwall ..
Red Sand Sea Towers ..
Siegfried Line (1939) - Germany's Western Defences ..

Defence, Emergency, Medical, Rescue

Defence & Rescue - Tony Blake
https://www.youtube.com/playlist?list=PLtakTnKQQMCxUJ1l6u4OXZpgi4RDUUkQI

Emergency & Medical - WW2 - Tony Blake
https://www.youtube.com/playlist?list=PLtakTnKQQMCyJgJMtMOdYByO2KxebfBqb

Fire Services — NFS, AFS, LFB - Tony Blake
https://www.youtube.com/playlist?list=PLtakTnKQQMCwPk-w2ej-S_SYisWNtRZxK

Wellcome Library historic medical playlists
https://www.youtube.com/user/WellcomeFilm/playlists

Blood transfusion 1941
https://www.youtube.com/watch?v=JDUHLJCgKas&list=PLXAu4-YhH76YNqRzRjIdAvd0yQ1R6gIdV&index=6

image: Ambulance - Nash Ambassador, converted; Austin K2 NFS fire tender

https://hiveminer.com/Tags/austin,nationalfireservice .

Medical Texts (1858+) ..

Defending US Mainland - 2021+

Time To Defend The US Mainland Again? Air and Naval Defenses - CoCa > .
23-6-13 NATO IAMD | NATO Integrated Air and Missile Defence > .

Detecting Submarines

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ASW - Detecting Submarines - Mil TV > .

Dubbed as the “Silent Service,” submarines are considered the most survivable weapons-delivery platform. Submarine detection and monitoring was traditionally the exclusive domain of highly classified military units specializing in naval anti-submarine warfare (ASW). Military ASW employs technologies such as magnetic anomaly detectors (MAD), which detect tiny disturbances to Earth’s magnetic field caused by metallic submarine hulls, passive and active sonar sensors that use sound propagation to detect objects underwater, as well as radar and high-resolution satellite imagery to detect surfaced submarines. Recent advances in commercial tools and technologies now give open-source researchers some ability to monitor submarine fleets. With commercial satellite imagery, synthetic aperture radar (SAR), hydro-acoustic sensors, and even social media analysis, open-source researchers can better understand the size and composition of countries’ submarine fleets, monitor the construction of submarines and submarine bases, and potentially learn about patrol patterns and behaviors. 

A submarine can be detected by a number of different sensors and methods.
2:44 Radar
3:55 Green Laser 
4:19 Infrared 
5:16 Hydrodynamic Water Pressure
5:35 Electronic Counter Measures (ECM)
5:59 Magnetic Anomaly Detection
6:25 Passive Sonar (+/- LOFAR, LO Frequency Analysis and Ranging)
7:38 Active Sonar
8:28 Evading Detection





Thursday, August 23, 2018

Field Fortifications - Defense in Depth

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23-7-12 Logistics. Russia's Fragility in Zaporizhia [Mapped] - gtbt > . skip > .

Firefighting History

21-9-11 History of Firefighting - History Guy > .

Fort Drum, Manila Bay

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Fort Drum: America's Unsinkable 'Concrete Battleship' - Calum > .

Fort Drum, originally known as El Fraile Island, is a huge, now ruinous complex of concrete and steel that once guarded the southern entrance to Manila bay. It's construction and took years and for much of it's history, it was regarded as strange, unique oddity on the horizon of manila bay. For a brief few months amid the desperate defense of the Philippines during WWII, it proved to be a formidable and impervious foe.

0:00 - Introduction
1:37 - The Islands of Manila Bay
2:13 - El fraile Island & The Battle of Manila Bay
3:23 - Fort Drum - Early Proposals & Designs
6:02 - Fort Drum - Final Plans & Layout
7:40 - Naming Fort Drum
7:57 - Construction Begins
8:27 - Armament
11:11 - Construction Finishes
12:00 - Garrison & Early Troubles
13:53 - War Preparations Begin
15:32 - A Date That Shall live in Infamy
16:03 - Philippines Invaded
16:46 - Fort Drum's Strong Defenses
19:43 - The Fall of Bataan
20:05 - The Last Line of Defense
20:49 - The Fall of Corregidor
22:21 - Fort Drum Fights on?
24:11 - What Happened to the Garrison?
25:01 - Allies Retake the Philippines
25:22 - Fort Drum Abandoned?
26:24 - Fort Drum's Final Siege
30:25 - What Remains of Fort Drum Today?
31:54 - Outro & Waffling on a bit

igitur quī dēsīderat pācem praeparet bellum

igitur quī dēsīderat pācem praeparet bellum    therefore, he who desires peace, let him prepare for war sī vīs pācem, parā bellum if you wan...