Chapter 2: Radio and Electronics Fundamentals

Question 1

What kind of radiation does a radio wave emit?

Answer 1

Electromagnetic

Question 2

What is a Hertz

Answer 2

A measurement of a wave’s frequency in cycles per second

Question 3

What is the frequency range of Medium Frequency transmissions?

Answer 3

300kHz - 3000kHz
or
0.3MHz - 3MHz

Question 4

What is the frequency range of High Frequency transmissions?

Answer 4

3MHz - 30MHz

Question 5

What is the frequency range of Very High Frequency transmissions?

Answer 5

30MHz - 300MHz

Question 6

What is a simplex system?

Answer 6

The transmitter and the receiver are operating on the same frequency

Question 7

What is a duplex system?

Answer 7

The transmitter and the receiver are operating on different frequencies

Question 8

Why must all VHF Distress, Urgency and Safety Communications, or VTS Traff Calls be performed in Simplex Operating Mode? (2 correct responses)

Answer 8

To ensure that vessels not directly participating in the communications can hear both sides of the radio exchange
OR
To allow an RCC or Coast Station to determine transmissions of Distress Vessels from Other Vessels

Question 9

Why must all MF-HF Distress, Urgency and Safety Communications take place solely on the 6 assigned frequencies and in the simplex operating mode? (3 correct responses)

Answer 9

To ensure that non-GMDSS ships maximize the chances of other vessels to receive those communications
OR
To ensure that GMDSS or DSC-equipped vessels maximize the chances of other vessels to receive those communications following the transmission of a DSC call of the correct priority
OR
To enable and RCC or Coast Station to only hear communications from the vessel actually in distress.

Question 10

For general communications, paired frequencies are normally used for?

Answer 10

Public Coast Stations

Question 11

For general communications, simplex frequencies are used for?

Answer 11

Between Ship Stations or Private Coast Stations