Grant, it is interesting your manuals for the M38 take this system back to it's possible roots in WW2 with the MB/GPW system.
A couple of years ago, while looking for C42 Set information on line, I stumbled into the National Archives site in London, England. They had two sequentially listed documents in their files for a "Vehicle Land Navigation System XC1". One was an initial report, the other the final report, both dated simply 1961, with a very cryptic Canadian reference. These were not online documents but had to be viewed in person or ordered blind. Struck my curiosity but not enough to follow up on, and with the "X" prefix for 'Experimental', my other thought at the time was it probably never saw the light of day.
Now it appears the system did indeed see some level of production volume, with intent for installation in a variety of vehicles. Very intriguing and whets the appetite for more information about it.
David
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