Description: 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.