Nuclear – David sized, Giant force

" Veikkaus Football Betting: David & Goliath"

Speaker : Albert Hsieh 2013/07/14

無限制潛艇戰（ Unrestricted submarine warfare ）

• In the early stages of the war, the U-boats (Untersee-boot) were extremely effective in destroying Allied shipping. In the mid-Atlantic, There was an extensive trade in war supplies and food, which was critical for Britain's survival.

Detail from John Hamilton's painting of a wolf pack attack on merchant vessels.

• The speed and range were severely limited underwater while running on battery power, U-boats were required to spend most of their time surfaced running on diesel engines, diving only when attacked or for rare daytime torpedo strikes.

• The most common U-boat attack during the early years

of the war was conducted on the surface and at night.

• Before the Allied forces developed truly effective antisubmarine warfare (ASW) tactics, this period was referred to by German submariners as "die glückliche Zeit“ (the happy time) .

Sonar

anti-submarine aircraft

Is this the end of submarine ?

The Nautilus

• "I touch my country's mind, I come to grips -With half her purpose, thinking of these ships...They mark our passage as a race of men.Earth will not see such ships as those again."John Masefield

Operation Sunshine

• It did not surface at the Pole, but continued on, and after 96 hours and 1,830 miles / 2945 km submerged under the ice pack, the Nautilus surfaced in the Greenland Sea.

Nuclear submarines

• Cylindrical profile of modern nuclear submarines, which are more hydrodynamic underwater, but less stable on the surface; opposite is generally true of U-boats subs

• Radar and anti-submarine aircraft, which had proved crucial in defeating submarines during the War, proved ineffective against a vessel able to quickly move out of an area, change depth quickly and stay submerged for very long periods

ballistic missile submarines (SSBN)

• Each submarine was armed with up to 16 UGM-27 Polaris A-3 nuclear missiles

Cuba Crisis

《世界歷史人物傳》 室古常葳 著 漢湘文化

The secret of the nuclear energy