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Operation CASTLE's 15 MT Bravo early fireball with Compton Effect lightning, March 1, 1954
Showing posts with label umbrella. Show all posts
Showing posts with label umbrella. Show all posts

Monday, August 26, 2013

Nuclear Effects at Sea (1975), Section 2

The 9 kt Mk-7 WAHOO device fires from 500 feet/152.4 m below, in water 3200 ft/975 m deep. The dark remnants (seen at the top) of the LCU and buoy at surface zero rose at 2000 ft/sec (610 m/sec)


 
A base surge wave from a nuclear detonation during 1958's Operation HARDTACK I, overcoming suspected USS Fulham, a destroyer closest to the west of the Enewetak shot locations of both UMBRELLA and WAHOO.


Both WAHOO and UMBRELLA positioned an LCU (Landing Craft Utility) and a buoy above the shot devices.

Note the deep water pressure vessel for each device. 
 Operation HARDTACK 1958
A ship's radar tower.
Operation HARDTACK's 3.8 megaton TEAK shot's frightening heat pulse forced military observers to rush for cover, from 252000 ft/80 km above. A navigational programming error sent the Redstone missile straight up over Johnston Island, instead of up and away for detonation over sea -- as the 3.8 MT ORANGE test did at 141, 000 ft/43 km. The observers were taken by surprise during TEAK.

Notice the bluish-white flash, common to surface, low and middle atmosphere nuclear detonations.
Safe under the cover of the bunker's entryway.

The warhead fired at 10:50 PM local time, August 1, 1958.

The commander explained radiation effects on crew members. This was a training film for ship commanders facing nuclear war at sea.

Notice the aspect ratio was corrected from VHS to digital formats. 

Crew readied a McDonnell Douglas F-4 Phantom for takeoff from above the fantail. 3 Grumman A6Es were parked at the upper right. A Lockheed S3-A Viking was near the centerline.

A Standard II missile launcher was loaded and ready.