Caption: This image, labelled as 111-SC-1187, depicts a typical trench wind chart during World War I. The chart shows wind directions categorized as "Safe," "Neutral," and "Dangerous" in the specified area. The symbols used on the chart include various letters and abbreviations representing different wind directions and intensities.

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Size: 9182px × 6304px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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