wrote in message
oups.com...

That was necessary to insure the secure "rotor machine"
encryption terminals (on-line or off-line capable)
for Command orders and responses.

No, it wasn't necessary. The most popular "rotor machine" crypto system in us
in ALL Navy ships was the off-line KL7 "ADONIS" system. It was incapable of
on-line connection, and did not require TTY to transmit messages. Morse worked
just fine, and 98% of all the "5-letter-coded-group" messages were generated on
KL7 off-line machines.

73, de Hans, K0HB
Master Chief Radioman, US Navy