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observation ['ɔbzə'veɪʃ(ə)n] abbr.
abbr. obbo   ؛observ   ؛obsv
abbr., mil. obsn   ؛obsr
mil., logist. The condition of weather and terrain that permits a force to see the friendly, enemy, and neutral personnel and systems, and key aspects of the environment. (FRA)

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