Vintage World War II US Army Forces  Navigational Aids
Vintage World War II US Army Forces  Navigational Aids
Vintage World War II US Army Forces  Navigational Aids
Vintage World War II US Army Forces  Navigational Aids
Vintage World War II US Army Forces  Navigational Aids

Vintage World War II US Army Forces Navigational Aids

$ 55.00

Offered are two World War II navigational aids. The black plastic disk is a Time Distance Computer Type D-4 U.S. Army Air Forces, circa 1943. The disc measures approximately 4 3/8" in diameter with a metal center core. Made in USA by J.B. Carroll Co.

Front Scale: True Altitude, Air Temp, Press. Alt. (ETA, Air Speed )
Back Scale: Cal. Air Speed, Air Temp, True A.S. (pressure Altitude, Density Altitude)

The white disk is made of a heavy card stock with a metal center core. It is a time-distance computer. The disk measures approximately 3 1/2" in diameter. No maker's information.

Front Scale: Miles, Hours, Minutes
Back Scale: Altitude, Air Speed, Temperature Centrigrade

Nice military collectibles in very good vintage condition.