Defense Military Tactical Communication 3 — Questions and Answers
Question 1: What does the term 'SITREP' stand for in military communications?
- Situational Report (Correct answer)
- Site Representative
- Signal Traffic Report
- Strategic Intelligence Report
Correct answer: Situational Report
SITREP stands for Situation Report, a periodic update on the current status of a unit or operation.
Question 2: Which encryption device family is used by U.S. forces to secure voice communications over tactical radios?
- SINCGARS
- KY-58 / KY-99 (Correct answer)
- HAVEQUICK
- SINCAM
Correct answer: KY-58 / KY-99
The KY-58 (and its successor KY-99) are voice encryption/decryption devices used with tactical radios in the U.S. military.
Question 3: What is 'frequency hopping' as employed by SINCGARS radios?
- Manually switching frequencies every hour per the CEOI
- Rapidly changing frequencies dozens of times per second to resist jamming (Correct answer)
- Selecting the clearest frequency after scanning all channels
- Alternating between primary and alternate frequencies based on signal strength
Correct answer: Rapidly changing frequencies dozens of times per second to resist jamming
SINCGARS frequency hopping changes transmission frequency up to 100 times per second, making interception and jamming extremely difficult.
Question 4: In tactical communications, what does 'PACE' stand for?
- Primary, Alternate, Contingency, Emergency (Correct answer)
- Position, Azimuth, Course, Elevation
- Primary, Alternate, Communication, Encoding
- Patrol, Attack, Consolidate, Exploit
Correct answer: Primary, Alternate, Contingency, Emergency
PACE is a communications planning framework: Primary, Alternate, Contingency, and Emergency means of communication.
Question 5: What is the correct proword to use when you want the receiving station to confirm it has received and understood your message?
- OVER
- OUT
- ROGER (Correct answer)
- CONFIRM
Correct answer: ROGER
ROGER means 'I have received and understood your last transmission' — the receiving station uses it to acknowledge.
Question 6: A soldier reports grid 'MB 123 456' during a radio call. What grid coordinate system is being used?
- Geographic coordinates (lat/long)
- Military Grid Reference System (MGRS) (Correct answer)
- Universal Transverse Mercator (UTM) in decimal
- Polar coordinate system
Correct answer: Military Grid Reference System (MGRS)
The MGRS format uses a grid zone, 100km square identifier (two letters), and numeric easting/northing — the format shown is standard MGRS.
Question 7: What is the primary purpose of a 'communications window' in tactical operations?
- A scheduled time when all units test their equipment simultaneously
- A specific time period when radio communications with higher HQ are authorized or possible (Correct answer)
- A physical opening in a building used to extend antenna range
- A software interface for entering radio frequencies
Correct answer: A specific time period when radio communications with higher HQ are authorized or possible
A communications window is a planned period during which a unit transmits or receives scheduled traffic, minimizing continuous emissions.
Defense Military Tactical Communication 3
What does the term 'SITREP' stand for in military communications?