发行时间：1987.09.30
总页数：72
编辑：
综保科技
摘要：
fm 21-60
visual signals
headquarters, department of the army september 1987
distribution restriction: ‘approved for public release; distribution is unlimited.’
chapter 1
introduction
1-1. general visual signals are any means of communication that require sight and can be used to transmit prearranged messages rapidly over short distances. this includes the devices and means used for the recognition and identification of friendly forces. 1-2. types of visual signals the most common types of vi...
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