@CBI_PTO_History Justin,
Regards US intelligence blind-spots Japanese air and sea power, the USN had a persistent & horrid weak spot on IJN radio-navigation.
Check this horrid bit of bureaucratic misdirection with Lorentz beams and IFF is from the USN NAVTECHJAP reports.
Regards US intelligence blind-spots Japanese air and sea power, the USN had a persistent & horrid weak spot on IJN radio-navigation.
Check this horrid bit of bureaucratic misdirection with Lorentz beams and IFF is from the USN NAVTECHJAP reports.
@CBI_PTO_History The navigation equipment throw away line about direction finding equipment refers to the Type 1 Air Mk III Direction Finder and Homing Device.
When you cross check with CINCPAC-5-45 "Japanese Radio Communications and Radio Intelligence" you find this...
ibiblio.org/hyperwar/USN/r…
When you cross check with CINCPAC-5-45 "Japanese Radio Communications and Radio Intelligence" you find this...
ibiblio.org/hyperwar/USN/r…
@CBI_PTO_History ...note:
* Course-indicator does not operate over great distances, has many defects. Appears that Japanese use this receiver in fighter aircraft to direct them to a rendezvous with enemy planes. Gear identical with that designed by Fairchild Aerial Camera Company. The antenna is
* Course-indicator does not operate over great distances, has many defects. Appears that Japanese use this receiver in fighter aircraft to direct them to a rendezvous with enemy planes. Gear identical with that designed by Fairchild Aerial Camera Company. The antenna is
@CBI_PTO_History ... a single rotatable loop with sense antenna.
That is not how any of that worked. Those loop antenna's found a plane's direction from known location coded radio beacons.
Central Bureau handed a list of such IJN beacons to Section 22 in Sept 1944...
en.wikipedia.org/wiki/Non-direc…
That is not how any of that worked. Those loop antenna's found a plane's direction from known location coded radio beacons.
Central Bureau handed a list of such IJN beacons to Section 22 in Sept 1944...
en.wikipedia.org/wiki/Non-direc…
@CBI_PTO_History ...so they would not confuse those LF & MF radio beacons associated with IJN air fields with radars.
Central Bureau was treading real hard on a US War/Navy Department intelligence agreement leaving all Japanese naval intelligence to the Navy.
The CB was multinational so they
Central Bureau was treading real hard on a US War/Navy Department intelligence agreement leaving all Japanese naval intelligence to the Navy.
The CB was multinational so they
@CBI_PTO_History ...used Australians to collect IJN signals to support SWPA operations.
The 7th Fleet Field units of Sec 22 got those beacons from CB.
So why that weird CenPac intelligence note?
And why didn't the USN meacon jam the hell out of them in the Pacific war?
The 7th Fleet Field units of Sec 22 got those beacons from CB.
So why that weird CenPac intelligence note?
And why didn't the USN meacon jam the hell out of them in the Pacific war?
@CBI_PTO_History @threadreaderapp unroll
@CBI_PTO_History By way of explaining my "USN meacon jam" comment, this is the only good diagram I've found showing masking beacon jamming of Luftwaffe non-directional radio beacons in WW2.
This is from Brian Johnson's book "The Secret War" which accompanied the BBC TV series of the same name.
This is from Brian Johnson's book "The Secret War" which accompanied the BBC TV series of the same name.
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