EAWS Aviation Communications and Navigation Systems

Question 1

What is the military UHF guard (emergency) frequency monitored by all military aircraft and installations?

Accepted Answer

243.0 MHz

Answer

121.5 MHz

Answer

156.8 MHz

Answer

282.8 MHz

Question 2

Which internationally recognized VHF frequency is used for civilian aeronautical distress communications?

Accepted Answer

121.5 MHz

Answer

156.8 MHz

Answer

243.0 MHz

Answer

282.8 MHz

Question 3

Which frequency band is primarily used for military tactical aviation voice communications due to its line-of-sight reliability?

Accepted Answer

UHF (300–3000 MHz)

Answer

HF (3–30 MHz)

Answer

VHF (30–300 MHz)

Answer

SHF (3–30 GHz)

Question 4

What does COMSEC stand for in the context of naval aviation?

Accepted Answer

Communications Security

Answer

Combat Systems Equipment Check

Answer

Common Secure Encoding

Answer

Communications Sector Control

Question 5

In standard radio communication procedures, what does transmitting 'OVER' at the end of a message indicate?

Accepted Answer

My transmission is complete and I expect a reply

Answer

The transmission is complete and no reply is expected

Answer

I am unable to receive your transmission

Answer

I am switching to a new frequency

Question 6

What is the primary purpose of the HAVE QUICK frequency-hopping system used in military aviation?

Accepted Answer

To provide anti-jamming protection for UHF radio communications

Answer

To extend UHF communications range

Answer

To encrypt voice transmissions end-to-end

Answer

To reduce mutual interference between aircraft on the same net

Question 7

Why is HF radio used by naval aviation when UHF and VHF are unavailable or insufficient?

Accepted Answer

Long-range beyond-line-of-sight communications via ionospheric propagation

Answer

Better voice clarity over short distances

Answer

More available frequency channels

Answer

Higher data transmission rates than other bands