Communication

Question 0

SOS

Answer 0

(Morse code signal) Save Our Ship - transmitted by a flashing light and may be used to communicate distress

three short, three long, three short

Question 1

MAYDAY

Answer 1

Distress call of the highest priority. Spoken three times. Shows that a person, boat or aircraft is threatened or in danger and requires immediate assistance.

Question 2

RADIO ALARM SIGNAL

Answer 2

Used to attract the attention of listeners on the frequency.
Consists of two audible tones of different pitch sent alternatively.

Question 3

PAN-PAN

Answer 3

Very urgent message concerning the safety of a person, or vessel, aircraft etc.
(Broadcasts on Ch 16, spoken in three repetitions)

Question 4

SECURITÉ

Answer 4

Is a safety signal spoken three times and transmitted on Ch 16. It indicates a message concerning the safety of navigation or important weather warnings

Question 5

EPIRBs - Electronic Position Indicating Radio Beacons

Answer 5

EPIRBs- transmits a digital signal with a beacon unique identifier. Owner registration allows automatic distress vessel identification and provide case prosecution critical information.

Two main types of EPIRBs-
121.5 MHz
406 MHz

Question 6

Channel 13

Answer 6

Bridge to Bridge frequency

This frequency is to clarify a vessels intent in meeting & passing situations

Question 7

Channel 16

Answer 7

International calling and distress frequency

Is used by vessels in emergencies or to establish contact with others

Question 8

Channel 21

Answer 8

Intra frequency (coast guard to coast guard) 
Working frequency for units in maritime mobile operations

Question 9

Channel 22

Answer 9

Primary liaison frequency for communications between CG units and civilian stations

Question 10

Channel 23

Answer 10

CG to CG working frequency used for communications between CG units working in maritime mobile operations

Question 11

Channel 81

Channel 83

Answer 11

CG to CG working frequencies for units in maritime mobile operations

Question 12

CH 5/11/12

Answer 12

Vessel traffic service

Question 13

CH 70

Answer 13

Digital select calling

Question 14

What are the 5 P’s?

Answer 14

Position 
POB 
PFD 
Phone number 
Problem