FMF - Fleet Marine Force Combat Communications Questions and Answers

Question 1

A Marine operating a frequency-hopping, encrypted radio net can hear the net control station, but their own transmissions are received as garbled audio.
Power, antenna, and frequency settings are confirmed correct.
What is the MOST likely cause of this communication failure?

Accepted Answer

The wrong COMSEC key is loaded, or the Time of Day (TOD) is incorrect.

Answer

The squelch setting on the radio is incorrect.

Answer

The operator is too far from the retransmission site.

Answer

The radio's battery is too low to transmit clearly.

Question 2

Which of the following BEST describes the primary function of the Single Channel Ground and Airborne Radio System (SINCGARS) in Frequency Hopping (FH) mode?

Accepted Answer

To rapidly change frequencies during transmission to prevent enemy jamming and interception.

Answer

To provide long-range, over-the-horizon communication by bouncing signals off the ionosphere.

Answer

To increase the transmission power for communicating through dense urban terrain.

Answer

To operate on a single, powerful frequency to ensure all subordinate units hear the transmission.

Question 3

A patrol makes initial contact with a significant enemy force, and the report must be sent immediately, taking precedence over all other radio traffic. Which message precedence proword should be used?

Accepted Answer

FLASH

Answer

IMMEDIATE

Answer

PRIORITY

Answer

ROUTINE

Question 4

The AN/PRC-117G is known as a "multiband" radio, giving it great versatility. This is due to its ability to operate across which of the following frequency bands?

Accepted Answer

Very High Frequency (VHF) and Ultra High Frequency (UHF), including SATCOM.

Answer

High Frequency (HF) and Very High Frequency (VHF)

Answer

Ultra High Frequency (UHF) and Super High Frequency (SHF)

Answer

High Frequency (HF) only

Question 5

You are attempting to establish communication but cannot hear the distant station. You have already checked your radio's power, volume, frequency, and antenna connection. According to standard troubleshooting procedures, what is a logical next step?

Accepted Answer

Attempt to contact the station using a different radio.

Answer

Immediately disassemble the radio to check for internal faults.

Answer

Assume the distant station's radio is broken and cease attempts.

Answer

Replace the battery, even if it shows a partial charge.

Question 6

What is the primary purpose of Communications Security (COMSEC)?

Accepted Answer

To deny unauthorized persons information derived from telecommunications and ensure the authenticity of such communications.

Answer

To ensure radio transmissions are loud and clear.

Answer

To catalog and track all communication equipment within a unit.

Answer

To assign radio frequencies to prevent friendly units from talking over each other.

A Marine operating a frequency-hopping, encrypted radio net can hear the net control station, but their own transmissions are received as garbled audio.Power, antenna, and frequency settings are confirmed correct.What is the MOST likely cause of this communication failure?

A Marine operating a frequency-hopping, encrypted radio net can hear the net control station, but their own transmissions are received as garbled audio.
Power, antenna, and frequency settings are confirmed correct.
What is the MOST likely cause of this communication failure?