Big Blue Blanket
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The big blue blanket was an air defense system devised by John Thach during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
for protecting American warships from attack by Japanese kamikazes.


History and tactics

As the American island hopping campaign got closer to Japan, the Japanese military began to employ suicide operations more extensively. As Allied losses mounted, a system for countering incoming suicide aircraft was developed.
Thach, serving on Admiral Halsey's and Admiral McCain's staff as air operations officer, developed a plan that called for the constant presence of the blue-painted Hellcats and Corsairs over the fleet at all hours. He recommended larger combat air patrols (CAP) stationed farther away from the carriers, a line of picket destroyers and destroyer escorts placed 50 or more miles from the main body of the fleet to provide earlier
radar Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ...
intercepts, and improved coordination between the fighter director officers on board the carriers. Thach also called for dawn-to-dusk fighter sweeps over Japanese airfields, and the use of delayed action fuses on bombs dropped on runways to make repairs more difficult,
The system left the picket ships extremely vulnerable to kamikaze attacks, but it gave more protection to aircraft carriers and troopships. The system had an immediate effect. During its use in the Liberation of the Philippines, "Despite an unopposed dry landing, 'suicide boats' and two hundred kamikazes made Mindoro's D-plus days as costly as Anzio's. Only saturation flights (called the "Big Blue Blanket") over Luzon airfields by Halsey's Task Force Thirty-Eight secured Mindoro." The Journal of Asian Studies, Vol. 19, No. 4. (Aug., 1960), pp. 478-479.
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See also

* List of established military terms


References

Aerial warfare tactics {{mil-aviation-stub