Happy days indeed Richard, I started in 1977 all our onboard electronics were supplied by Texas Instruments, the main survey navigation computer was from an American battle tank ( ruggedly built ) from memory it was a version of a TI 980 series.. The land radio base stations were set up normally a few months before we arrived for each survey, each located in position using a refined scatterplot of position from many passes of transit satellite positioning, I cant remember the reciever model for the transit sat, but I know it was a Magnavox. The best base station I visited during this era was off the West coats of India, they had positioned it on the seashore right slap in the middle of Boliwood above Bombay where all the indian movies were made, it was something else to visit, as you never knew what you would see on each visit..
I have some photos of the early survey ships with their rigged texas towers and manual tracking antennas, we looked like spy ships..
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