[GreenKeys] Moonbounce teletype?

[Jim Haynes]

The late Walt Zenner, V.P. of R&D at Teletype Corp., contributed to a
history of the company that was privately printed in a very small run.
Here's what he had to say about that.

"Shortly after World War II, the Navy staged a demonstration in which
a radar set was used to send a teletype signal to the moon with the
reflection being received in hawaii, where it was retransmitted
back to the moon with the reflection being received in Washington.
The travel time for this double trip was reported as 5.4 seconds.
At the rate of 100 words per minute (10 characters per second) 5.4
seconds equals 54 character time periods.  With continuous transmission,
this means that while character #1 is being received, character #54
is being transmitted and that a total of 54 are in transit.  Using
the system in vogue before Howard Krum's invention, where both the
send and receive distributors are started simultaneously, the received
signals and the receiving distributor would be out of synch by 54
characters.  With the Krum system [start-stop] the receiver waits
patiently until the signal arrives, when it starts in synch with the
incoming signal.  In the Navy test, the Model 28 printer operated
correctly."

This is part of a discussion of Howard Krum's invention of the
Start-Stop system.