Not sure if E is correct… But this is what his opinion was
Here it is.
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Clas1-99
Which would suggest E's statement about DOE Q clearance being correct
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but like I said I'm not really sure about that..
Just not something I know much about.
Five by five is a radio communications expression that means 'loud and clear'. One of the fives represents the S units of reception strength. The other five is a rating of the signal clarity. Five by five is a good, clear signal. The radio use of this expression goes back to the 1950s
o7