What is the name commonly used for a location system for radio transmission?

Question

What name was commonly used for the struggle that emerged after World War II between capitalism and communism that centred around the USSR & the USA and their partners, that lasted from about 1947 to 1991?

Answer 1

Huff-duff
HFDF, commonly known as Huff-duff, or high-frequency direction finding, used two or more radio receivers to find the bearings of a radio transmitter and with the use of simple triangulation found the approximate position of the transmitter. Used during WWI and WWII.