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Unit 52. Response to Basic Emergencies. Objectives. Spell and define terms. Recognize emergency situations that require urgent care. List and describe the eleven standardized types of codes. Objectives. Evaluate situations and determine the sequence of appropriate actions to be taken.

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29 Navajo recruits developed the code at Camp Pendleton, California in 1942.

Although many Native American tribes have served as code talkers during wartime, the Navajo tribe had the largest group during World War II. Their code was never broken by the Japanese. It was so valuable that it was kept secret until 1968, over 20 years after the war ended.

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2.4 Gray Code

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