San Francisco : Architect and Engineer, Inc · leaf 38
t im-provements and refinements. Today, upon theground observer system depends in large partthe efficacy of the Interceptor Commandswhich, day and night, are guarding our shores. The system parallels in many respects—al-though with important differences—the air de-fense which, by the outbreak of… … ON THE BALCONY — Instant telephone communicationamong the officers at an Army Information Center and topoints outside is available through equipment such as isshown here against definitely located targets only. Esti-mates are that each plane on ground alert isthe equivalent of I 6 on patrol…
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