2 ms·

A special car These have a surprisingly long history, e.g. https://en.wikipedia.org/wiki/Direction_finding#/media/File:British_Post_Office_interference_findin

by pvg 4y ago

A special car These have a surprisingly long history, e.g. https://en.wikipedia.org/wiki/Direction_finding#/media/File:British_Post_Office_interference_finding_truck_1927.jpg https://en.wikipedia.org/wiki/Direction_finding#/media/File:...