The manual is designed as a self-study text for use by personnel of the Navy and Naval Reserve who are preparing to meet professional requirements for advancement in the rating of Aviation Electronics Technician. The document opens with a review of leadership and qualifications for the Aviation Electronics Technician rating. Other chapters cover publications, drawings, and schematics; elementary physics; special tools and materials; avionics support equipment and maintenance; airborne computers; electrical power and ground cooling systems; airborne communications equipment; airborne navigation equipment and radar; electronic countermeasures; and security. There are four short appendixes: Formulas, Symbols, Laws of Exponents, and the Greek Alphabet. An index concludes the volume. (NH)