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1
What does SOI stand for?
Signal Operation Instructions
2
What does the SOI provide?
  • The organization of stations into nets
  • Assigns call signs
  • Designates Net Control Stations (NCS)
  • Assigns frequencies
  • Changes to alternate frequencies
  • Security Procedures to be used by Radio Operators
3
What Field Manual covers Tactical Single-Channel Radio Communications Techniques?
FM 24-18
4
What percent of slack should you allow when laying WD1 wire?
20 percent
5
Which means of communication is least secure?
Radio
6
What are five methods of communication?
  1. Radio
  2. Sound
  3. Visual
  4. Messenger
  5. Wire
7
Which means of communication is most secure?
Messenger
8
What is COMSEC?
COMmunications SECurity
9
What is OPSEC?
OPerations SECurity
10
List 5 factors that affect the range of radio equipment?
  • Weather
  • Terrain
  • Antenna
  • Power
  • Location
11
What does NCS stand for?
Net Control Station
12
What does MIJI stand for?
Meaconing, Intrusion, Jamming and Interference
13
What is the range of a TA-1 field phone?
Approximately 3.7 miles using field wire
14
How many volts are in a TA-1 field phone when squeezed?
100 volts
15
What is the maximum effective distance of a TA-312 field phone in wet and dry climates?
  • Wet - 14 miles
  • Dry -22 miles
16
What does CB, LB, and CBS stand for on a TA-312 field phone?
  • CB-common battery
  • LB-local battery
  • CBS- common battery signaling
17
BA30 batteries should be installed how, in a TA-312 field phone?
1 up 1 down
18
What is WD-1?
Communications field wire
19
What does the "W" and "D" stand for in "WD-1" Wire?
Wire Drum
20
How deep should you dig when laying WD1 wire under hard-packed dirt roads?
6 to 12 inches
21
How deep should you dig WD1 wire in loose or sandy soil?
At least 3 feet
22
How much WD1 wire is on a donut roll (MX306)?
1/2 mile
23
How much WD1 wire is on a DR8 reel?
1/4 mile
24
How far beyond each side of the road should wire be buried?
At least 2 ft
25
WD1 wire must be how high above a road crossing?
At least 18 ft
26
How much tape should you use when taping a splice?
At least 4 inches
27
What device is used to enter FH (Frequency Hop) Data info into the SINCGARS?
A MX-10579 ECCM Fill Device
28
What do the letters AN and PRC stand for?
Army/Navy and Portable Radio Communicator
29
What is an AN/PRC-68?
A type of Squad radio small unit transceiver
30
What is the first thing you do before sending a radio message?
Listen to see if the Net is clear
31
What does SINCGARS stand for?
SINgle Channel Ground/Airborne Radio System
32
How much does the AN/PRC 77 weigh?
About 25 lbs
33
What is the approximate range of the AN/PRC 77?
5 to 8 KM
34
How many channels does the AN/PRC 77 have?
920
35
What type of knot do you use when repairing WD1 wire?
A square knot
36
Most infantry radios are _____ Modulated?
FM
37
What does EPLRS Stand for?
Enhanced Position Location Reporting System

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