I do not have much information on the this wheel chart. It was probably produced as a training aid for tank commanders .
The one shown below is dated April 1973; so it is from the Vietnam War/Cold War period. It provides data on 14 different armoured cavalry operations, including Weapons Ranges, Fire Request, Route Reconnaissance, and Attack Planning. It also provides instructions on how to prepare for a nuclear attack. A 1:50,000 map grid scale and 360 degree protractor are included. The wheel chart is double-sided, 4″ square and made of plastic.
I have seen a reference to a 2006 version so it may still be in production.