On Mon, 7 Dec 2015 12:42:12 -0500, "Mr. Luddite"
wrote:

I remember one day while in port a bunch of "yardbirds" came aboard
and installed the weirdest looking antenna I had ever seen on the ship.
It looked like something out of a Buck Rodgers' movie. I later found
out it was an antenna for a new-fangled system called "Satellite
Navigation" ... an early military GPS system.


They did the software development for GPS at IBM Gaithersburg in the
System Center. (demo area for the sales people)
This was just another water cooled to anyone who looked but they were
working on a project that was classified at the time. The only obvious
"security" was a blue velvet rope around the console station. I assume
the real work was being done somewhere else in the complex on
terminals.