Big blue blanket
Encyclopedia
The big blue blanket was a system devised by John Thach
John Thach
John Smith "Jimmy" Thach was a World War II naval aviator, air combat tactician, and United States Navy admiral. Thach developed the Thach Weave, a combat flight formation that could counter enemy fighters of superior performance, and later the big blue blanket, an aerial defense against Kamikaze...

 during World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 for protecting warships from attack by Japanese kamikaze
Kamikaze
The were suicide attacks by military aviators from the Empire of Japan against Allied naval vessels in the closing stages of the Pacific campaign of World War II, designed to destroy as many warships as possible....

s.

History and tactics

As the American island hopping
Island hopping
Island hopping is a term that refers to the means of crossing an ocean by a series of shorter journeys between islands, as opposed to a single journey directly across the ocean to the destination.- Forms :...

 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 patrol
Combat air patrol
Combat air patrol is a type of flying mission for fighter aircraft.A combat air patrol is an aircraft patrol provided over an objective area, over the force protected, over the critical area of a combat zone, or over an air defense area, for the purpose of intercepting and destroying hostile...

s (CAP) stationed farther away from the carriers, dawn to dusk fighter sweeps over Japanese airfields, the use of delayed action fuses on bombs dropped on runways to make repairs more difficult, a line of picket destroyer
Destroyer
In naval terminology, a destroyer is a fast and maneuverable yet long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller, powerful, short-range attackers. Destroyers, originally called torpedo-boat destroyers in 1892, evolved from...

s and destroyer escort
Destroyer escort
A destroyer escort is the classification for a smaller, lightly armed warship designed to be used to escort convoys of merchant marine ships, primarily of the United States Merchant Marine in World War II. It is employed primarily for anti-submarine warfare, but also provides some protection...

s placed 50 or more miles from the main body of the fleet to provide earlier radar
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...

 intercepts, and improved coordination between the fighter director officers on board the carriers."


The system left the picket ships extremely vulnerable to kamikaze attacks, but gave more protection to 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
Mindoro
Mindoro is the seventh-largest island in the Philippines. It is located off the coast of Luzon, and northeast of Palawan. The southern coast of Mindoro forms the northeastern extremum of the Sulu Sea.-History:...

'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."
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