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[Firing and Deflection Conversion Tables]
This document (FT 81 B3, abridged) consists of two pages, each with a separate table. The first table is a chart that shows range and elevation for firing particular mortar shells. The second page includes a chart with range and deflection (presumably for the same kind of shells), as well as notes which give additional instructions.
Date:
November 1, 1940
Creator:
United States. Army. Ordnance Dept.
System:
The Portal to Texas History