ACP 135(F), CHAPTER 2

Question 1

Which procedures comprise all the communications relating to the immediate assistance required by the
mobile station in trouble?

Answer 1

Distress

Question 2

Which word when using voice does the distress signal contain?

Answer 2

MAYDAY

Question 3

What are the two primary sinusoidal audio frequency tones transmitted alternatively in alarm signals
used to warn operators that a distress call or message is to follow?

Answer 3

2200 Hz and 1300 Hz

Question 4

How many seconds is the alarm signal continuously sent to warn operators that a distress call or message

is to follow?

Answer 4

30-60

Question 5

Which paging technique is used to automate the initial call between two stations that operates on MF,
HF, and VHF marine bands for distress, urgency, and safety alerting?

Answer 5

DSC

Question 6

How many times is MAYDAY spoken during a distress call?

Answer 6

3

Question 7

How many times is SOS typed during a distress call using RATT/NDPB?

Answer 7

3

Question 8

Which prosign is used during a distress call using RATT/NDPB?

Answer 8

DE

Question 9

What is the International Distress frequency for voice?

Answer 9

2182 kHz

Question 10

10. What is the International Distress, Safety, and Calling frequency for the maritime mobile VHF
    radiotelephone service?

Answer 10

156.8 MHz

Question 11

11. Which signal is used to impose silence either on all stations of the mobile service in the area or on any
    station which interferes with the distress traffic when using RATT/NDPB?

Answer 11

QRT SOS