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Question 1

Define HF and discuss its basic applications

Answer 1

HF – High Frequency: Capable of both long and short-range secure voice and data comm.
Most of the world refers to the HF Band as the frequencies between 3 – 30 MHz.
Two types of HF Propagation: Ground Wave & Sky Wave

Question 2

What are the modes of HF radio wave propagation?

Answer 2

Ground wave and sky wave

Question 3

Define VHF and discuss its basic applications

Answer 3

VHF – Very High Frequency: Most of the world refers to the VHF Band as the frequencies between 30 – 300 MHz.
Normal comms.

Question 4

What is SINCGARS?

Answer 4

Single Channel Ground and Airborne Radio (SINCGAR) set, AN/PRC 119. It can be used as a man pack radio or a vehicle mounted radio.

Question 5

What are the two modes of operation for the SINCGARS?

Answer 5

Single Channel – When in SC mode, you are operating on one frequency.
Frequency Hopping – FH mode is used for secure transmissions due to the radio frequency constantly shifting to reduce or eliminate the threat of jamming, interception, and direction finding

Question 6

Recite the Phonetic Alphabet.

Answer 6

Alpha/Bravo/Charlie/Delta/Echo/Foxtrot/Golf/Hotel/India/Juliet/Kilo/Lima/Mike/ November/Oscar/Papa/Quebec/Romeo/Sierra/Tango/Uniform/Victor/Whiskey/X-ray/Yankee/Zulu

Question 7

What are the three levels of security classification?

Answer 7

Top Secret: Top Secret is the classification level applied to information whose unauthorized disclosure could reasonably be expected to cause exceptionally grave damage to the national security
Secret: Secret is the classification level applied to information whose unauthorized disclosure could reasonably be expected to cause serious damage to the national security
Confidential: Confidential is the classification level applied to information whose unauthorized disclosure could reasonably be expected to cause damage to the national security