The big blue blanket was an

air defense Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...

system devised by

John Thach John Smith Thach (April 19, 1905 – April 15, 1981) was a World War II Naval Aviator, air combat tactician, and United States Navy admiral. Thach developed the Thach Weave, a combat flight formation which could counter enemy fighters of superior ...

during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

for protecting American warships from attack by Japanese

kamikaze , officially , were a part of the Japanese Special Attack Units of military aviators who flew suicide attacks for the Empire of Japan against Allied naval vessels in the closing stages of the Pacific campaign of World War II, intending to d ...

History and tactics

As the American

island hopping Leapfrogging, also known as island hopping, was a military strategy employed by the Allies in the Pacific War against the Empire of Japan during World War II. The key idea is to bypass heavily fortified enemy islands instead of trying to captu ...

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 Admiral Halsey may refer to: *U.S. Fleet Admiral William Halsey Jr., (1882–1959) **The Paul McCartney song "Uncle Albert/Admiral Halsey "Uncle Albert/Admiral Halsey" is a song by Paul and Linda McCartney from the album ''Ram''. Released in the ...
's and Admiral McCain's staff as air operations officer, developed a plan that called for the constant presence of the blue-painted
Hellcats ''Hellcats'' is an American cheerleading comedy-drama television series that originally aired on The CW in the United States from September 8, 2010, to May 17, 2011. Based on the book ''Cheer: Inside the Secret World of College Cheerleaders'' b ...
and Corsairs over the fleet at all hours. He recommended larger
combat air patrol Combat air patrol (CAP) 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, ...
s (CAP) stationed farther away from the carriers, a line of picket
destroyer In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against powerful short range attackers. They were originally developed in ...
s and
destroyer escort Destroyer escort (DE) was the United States Navy mid-20th-century classification for a warship designed with the endurance necessary to escort mid-ocean convoys of merchant marine ships. Development of the destroyer escort was promoted by th ...
s placed 50 or more miles from the main body of the fleet to provide earlier
radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...
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 An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. Typically, it is the capital ship of a fleet, as it allows a n ...

and

troopships A troopship (also troop ship or troop transport or trooper) is a ship used to carry soldiers, either in peacetime or wartime. Troopships were often drafted from commercial shipping fleets, and were unable land troops directly on shore, typicall ...

. The system had an immediate effect. During its use the

Liberation of the Philippines Liberation or liberate may refer to: Film and television * ''Liberation'' (film series), a 1970–1971 series about the Great Patriotic War * "Liberation" (''The Flash''), a TV episode * "Liberation" (''K-9''), an episode Gaming * '' Liberati ...

, "Despite an unopposed dry landing, 'suicide boats' and two hundred kamikazes made

Mindoro Mindoro is the seventh largest and eighth-most populous island in the Philippines. With a total land area of 10,571 km2 ( 4,082 sq.mi ) and has a population of 1,408,454 as of 2020 census. It is located off the southwestern coast of Luz ...

's D-plus days as costly as

Anzio Anzio (, also , ) is a town and ''comune'' on the coast of the Lazio region of Italy, about south of Rome. Well known for its seaside harbour setting, it is a Port, fishing port and a departure point for ferries and hydroplanes to the Pontine I ...

'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.
/ref>

References

Aerial warfare tactics {{mil-aviation-stub