No. of Tapes
Receivinq
Tape
Transmitt~
Tape
Receiving
~
(u
600
AGC-7
AV-L
AV-5
(2)
600
AV-4
AGC-7
AV-5
(3)
&x)
AV-5
AGC-7
AV-4
(4)
AGC-7
Los Alamos
(5)
Los Alamos
MC-7
(6)
m
AV-4
Los Alamos
(7)
400
Los Alamos
Al?++
(8)
400
AV-5
Los AbllOS
(9)
400
Los Alamos
AV-5
d
Wstems (1) through (3) were to be used for both three-way conference and
classifiedmessages between the ships. Systems (4) through (9) provided coding facilities for Atomic lhergy Commissionmessages between the
ships and Los fbmos.
The number of tapes were based on an estimate of
the amount of traffic plus a large safety margin. Half of the tapes
in each system were ordered to arrive by 15 February 1948, the remaining half to be delivered by 1 March 1948.
On 20 November 1947 a request was submitted to the Atomic Mergy
Commission for a leased teletype lib
frombs
Alamos to the Presidio
of San Francisco,major relay station in the Amy
Command and Adminis-
trative Net (ACAN). This circuit was required to provide a continuous
traffic to and from the forward area and to bypass the
points noxmall.yinvolved in passing messages into the Amy
42
Section XI
.