[Milsurplus] Navigation System

[Mike Hanz]

>
>
>For WWII-era, you'd have to omit the AN/ARN-6, which is definitely a post-WWII set.  Oddly enough, the improved SCR-269 (BC-433) ADF, the AN/ARN-7, well predates the AN/ARN-6.  
>

Well, I was somewhat less certain about that when I read the 
observation.  In the process of moving, I unearthed CO-NAVAER 08-5Q-227 
(Nomenclature List for Bureau of Aeronautics Aircraft Electronic 
Equipment - Confidential) dated 1 April 1945, and the ARN-6 is listed 
there plane (heh) as day.  Equipment that hasn't been released for 
deployment yet has "In development" next to the entry, but no such 
remark accompanies this entry, which simply sez, "AN/ARN-6( ).   
Airborne MF Automatic Radio Compass.  Lighter in weight than SCR-269."  
I'll agree it was probably not widely deployed by then, but 
/technically/ it seems to qualify as a WWII set - depending on one's 
definition of 'wartime', I suppose.  Of the ARN-7, the entry says, 
"Airborne MF Automatic Radio Compass.  Similar to SCR-269( ) except 
added frequency range."  It also lists ARN-8 and ARN-12 marker beacon 
receivers.  No indication of ARN-9 to 11, but that's typical for the 
Navy pubs...if it's a Signal Corps-instigated acquisition, they ain't 
interested in them.  :-)

73,
Mike