Sgt. James L. Mc Garrigle, , is seen in this photograph using the combination bearing plate and drift indicator. This innovative device was invented by members of the Signal Corps Research Laboratory in Washington, The photo was taken on September 29, 1918. (Note: This caption is intended for official use only and should not be published.)

---

Size: 8410px × 5658px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., .., 29/18, activities, american, army, bearing, combination, corps, development, drift, effort, equipment, garrigle, gathering, gear, indicator, information, innovation, intelligence, invention, inventions, james, laboratory, machinery, mc, military, official, operations, personnel, planning, plate, prototype, research, resources, sc-18560, sept., sgt., signal, soldier, soldiers, strategy, technology, tool, trench, war, warfare, washington, world