ABSTRACT
In Germany, the development of the first technologies of sonar and radar were interrelated. Following Christian Hulsmeyer's forgotten invention of the "Telemobiloskop" in 1904, two Berlin engineers, Paul Gunther Erbsloh and Hans-Karl von Willisen, developed and built devices to locate targets accurately by reflections with underwater sound and radi
TABLE OF CONTENTS
part 1|2 pages
IN THE BEGINNING WAS AN IDEA
part 4|2 pages
THE INCORPORATION OF GEMA