Detecting Submarines

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ASW - Detecting Submarines - Mil TV > .

24-5-19 Detection Advances vs Future of Ballistic, Attack Submarines - Perun > .

23-10-31 Sonar revealing secrets of sea, lakes, and rivers - CuDr > .

23-7-7 Sonar - Qxir > .

22-11-23 Whatever Happened to Cargo Submarines? - F&E > .

21-10-19 How submarines navigate and find targets - Forces > .

20-12-26 How Sonar Works (Submarine Shadow Zone) - Smarter > .

20-3-14 How Submarines 'See' Underwater - Sonar Overview - CoCa > .

20-1-31 Unmanned Underwater Vehicles - Future of Submarines - CoCa > .

Nuclear Submarine Deep Dive - Smarter >> .

Warfare Topics - Covert Cabal >> .

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

Field Fortifications - Defense in Depth

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23-7-12 R-U Obstacles & Hx Hindenburg Line, Devil's Gardens - Invicta > .

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

23-6-10 SatIm Rusciam Defensive Fortifications - Such > . 

23-6-2 How Ruscia Is Preparing for Ukraine’s Counteroffensive | WSJ > .

23-4-28 Ukrainian counter-offensive vs Ruscia's 'dragon's teeth' - Forces > .

22-12-18 Bakhmut & Ukraine Trench War - fortifications, H/burg WW1 - Perun > .

>> Defense >>>

Hindenburg Line WW1 

The Hindenburg Line - Ludendorff's Defence In Depth - WW1 > .
The Hindenburg Line Breaks - The Lost Battalion Returns - WW1 > .
The Battle of the Selle - Ludendorff Resigns - WW1 > .

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 > .

22-5-12 The Philippines - China's New Province - laowhy86 > .

> HPh - Philippines >>

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

German defences

Flak Towers - Flaktürme > .

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

History's Most Wasteful Military Spending - Side > .

Atlantic Wall: Nazi Defence of Europe - Mega > .

23-7-12 R-U Obstacles & History of Defensive Lines - Invicta > .

German AA Missiles - An Efficient Alternative to Flak?
https://www.youtube.com/watch?v=B7Q92V5hK-c

German Anti-Air Missiles of World War 2
https://www.youtube.com/watch?v=Cx_lsh0BJGs

MHV >> playlists

https://www.youtube.com/channel/UCK09g6gYGMvU-0x1VCF1hgA/playlists

Atlantikwall ..

The Atlantic Wall (German: Atlantikwall) was an extensive system of coastal defence and fortifications built by Nazi Germany between 1942 and 1944 along the coast of continental Europe and Scandinavia as a defence against an anticipated Allied invasion of Nazi-occupied Europe from Great Britain during World War II.

Hitler ordered the construction of the fortifications in 1942. Almost a million French workers were drafted to build it. The wall was frequently mentioned in Nazi propaganda, where its size and strength were usually exaggerated. The fortifications included colossal coastal guns, batteries, mortars, and artillery, and thousands of German troops were stationed in its defences. When the Allies eventually invaded the Normandy beaches in 1944, most of the defences were stormed within hours. Today, ruins of the wall exist in all of the nations where the wall was built, although many structures have fallen into the ocean or have been demolished over the years.
https://en.wikipedia.org/wiki/Atlantic_Wall

Atlantic Wall - Example of a Coastal Defense Position - Atlantikwall - MHV
https://www.youtube.com/watch?v=BirksQIGyk8

https://www.youtube.com/results?search_query=Atlantic+Wall

Defence of the Reich - Reichsverteidigung ..

German defences ..

45-3-23 Werwolf Speech ..

Atlantikwall

Atlantikwall ..
Atlantikwall - Channel Islands ..

Ostwall

Ostwall ..

Westwall

Siegfried Line (1939) - Germany's Western Defences ..