SECTION I. SPECIAL COMMUNICATIONS SYSTEM
LEARNING EVENT 1: SYSTEM DESCRIPTION
1. The SCS permits direct, automated, real-time communications in support of joint forces requiring rapid
deployment or redeployment. SCS terminals send and receive record narrative messages over a 5-kHz
narrowband satellite channel.
2. The SCS operates in the UHF spectrum using the 225 to 400 MHz band. The Army, Navy, and Air Force
operate SCS terminals. They consist of SATCOM terminals AN/GSC-40, AN/GSC-40A(V)1, AN/GSC-
40A(V)2, and AN/MSC-64(V)2.
3. The SCS terminal AN/MSC-64(V)2 is a highly mobile set installed in an S-280 type shelter. The rack-
mounted combined ground command post terminal (CGCPT) AN/GSC-40(*)(V)(*) is configured to the needs
of the fixed site at which it is installed.
LEARNING EVENT 2: DEPLOYMENT
1. SCS terminals are deployed in Europe and Korea. All Army terminals function within a TACSAT network
made up of force terminals (FTs) and command post (CP) equipment.
2. All SCS terminals deployed in a theater are operated as a network. The United States Pacific Air Force has
operational responsibility for all Air Force SCS terminals in the Korean theater. The United States Army
provides off-site maintenance support for United States Air Force terminals in the Korean theater. Within joint
commands, the US Army component commands are responsible for operation and maintenance of the SCS
terminals assigned to their subordinate units.
3. SCS terminals deployed to Europe and Korea support Army, Navy, and Air Force real-time communication
requirements for on-going special missions.
LEARNING EVENT 3: EMPLOYMENT
1. The SCS terminal is a single-channel TACSAT set. Each SCS terminal uses an I/O device. The device has
a keyboard and display for editing and composing narrative traffic. The keyboard and display equipment is the
I/O unit MX-10159/G that functions as the sole subscriber data terminal equipment (DTE). The AN/MSC-
64(V) and AN/GSC-40(V) are self-contained terminals.
a. The AN/MSC-64(V)2 contains a complete communications system housed in an S-280 shelter, carried
by a 2 1/2-ton truck and powered by a trailer-mounted, 10-kilowatt generator. The AN/MSC-64(V)2 can also
be powered by the vehicle engine with a 100-amp kit. The I/O unit organic to the terminal is the primary DTE
and can be