The following report on the detection of enemy submarines using radio direction finders
is taken from Tactical and Technical Trends
No. 1, June 18, 1942.
[DISCLAIMER: The following text is taken from the U.S. War Department
publication Tactical and Technical Trends. As with all wartime
intelligence information, data may be incomplete or inaccurate. No
attempt has been made to update or correct the text. Any views or
opinions expressed do not necessarily represent those of the website.]