GMDSS QUESTION PAPER

                                                           

Time : 1 Hour                                       GMDSS GOC – SET 1                                        60 marks

PART-1 INSTRUCTIONS:

Do not write anything on the question paper. Write your answers only in the answer sheet provided.

Write your name and roll number on the answer sheet on every page.

Mobile phone or any other electronic devices strictly not permitted.

Section – A is objective and Section-B is descriptive type.

Candidates have to score minimum 15 marks in each section and total 36 marks to pass this paper.

In section-A include the correct/most appropriate choice(A,B,C or D) against the respective question.

In section-B answer should be discreet and brief and should be written against the question.

1.      What features may be found on certain satellite EPIRB units?

a.       Strobe light

b.      b. Emergency transmission on 406MHZ

c.       float free release bracket

d.      all of these

2.      What statement is true regarding 406MHZ EPIRB units?

a.       Allows immediate voice communication with RCC

b.      Coding permits the SAR authorities to know  if manually or automatically activated

c.       Transmits a unique hexadecimal identification number

d.      Radio operator programs his I.D in to SART immediately prior to activation

3.      Which of the following is normally found on EPIRB that are detected by satellites?

a.       A strobe light

b.      5 watt 406MHZ beacon

c.       A bracket designed to allow the EPIRB to automatically float free

d.      All of the above

4.      Which piece of required GMDSS equipment is the primary means of transmitting locating signals?

a.       Radio direction finder (RDF)                  

b.       an EPIRB transmitting on 406 MHZ

c.       Survival craft transceiver                          d. a SART transmitting on 406 MHZ

5.      What is an example of locating signal?

a.       SSB phone traffic                                    

b.       ship to shore transmission

c.       Loran C                                                     d. A float free EPIRB

6.      With what other stations may probable survival craft transceivers communicate?

a.       Communications permitted between survival crafts

b.      Communications permitted between survival crafts and ship

c.       Communications permitted between survival crafts and rescue unit

d.      All of the above

7.      Equipment for Radio Telephony use in survival craft stations under GMDSS must have

What capability?

a.      Operation on CH 16                               

b.       operation on 457.525 MHZ

c.       Operation on 121.5 MHZ                         d. any one of these

8.      Equipment for Radio Telephony use in survival craft stations under GMDSS must have

What characters?

a.      Operation on CH 16                               

b.       watertight

c.       Operation on 121.5 MHZ                         d. All of these

9.      Which statement is NOT true regarding the requirement of survival craft portable two way VHF radio telephone equipment?

a.       Operation on CH 16        

b.       effective radiated power should be minimum of 2.0 watts

c.       Simplex (single frequency) voice communications only               d. all of these

10.  Which action should the GMDSS radio operator take in a distress situation when embarking in survival craft?

a.      Switch on EPIRB and SART immediately

b.      EPIRB and SART switched on manually prior to embarking remain aboard vessel in distress

c.       Notify RCC (rescue coordination centre) through VHF DSC in portable equipment

d.      Communicate via Inmarsat-C from the survival craft

11.  Which of the following has been designated for on-scene communication in GMDSS?

a.       CH 24                              

b.       CH 2182                         

c.        CH 70

d.      CH 16 on VHF radio telephone and 2174.5 KHZ using MF NBDP

12.  Which of the control selection may result in limited receiving range?

a.       Setting the squelch control to its minimum level

b.      The power switch is set to the high output position result in receiver overloading

c.       Setting the squelch control to its maximum

d.      Setting the channel selection midway between channel 6 and 16

13.  Which factors normally determine the range of VHF transmissions?

a.       Channel frequency                       

b.       Power level

c.       Both B) and D)                            d. vessel antenna height

14.  Cause of much longer than normal VHF transmissions are

a.       Changing power from 1W to 25W          

b.       Atmospheric ducting

c.       Ionospheric activity in layers F1/F2          d. None of the above

15.  The effectiveness of VHF communications is maximized by

a.       The adjustment of squelch for maximum receiver sensitivity

b.      Appropriate setting of the transmitter power

c.       Selecting an appropriate channel

d.      All of the above

16.  A vessel using safety NET should

a.       Notify the NAVAREA coordinator   you are using safety NET for MSI

b.      Set the receiver to present NAVAREA

c.       Set the receiver to your destination ocean region

d.      Notify the NAVAREA coordinator   you are using safety NET for MSI

And set the receiver to your destination ocean region

17.  In using the safety NET for MSI (maritime safety information)

a.       If you fail to log-in with your ocean region, you will receive only unscheduled urgent and distress broadcasts

b.      To receive scheduled and unscheduled broadcasts, you must log-in with your ocean region Net control station (NCS )

c.       Your satellite receiver must have Enhanced Group Calling (EGC)

d.      All of these

18.  MF/HF transceiver power levels should be set

a.      To the lowest level necessary for effective communication

b.      To the level necessary to maximize the propagations

c.       To the highest level possible so as to ensure other stations can not break in

On the channel during use

d.      Both a) and c)

19.  Where should the GMDSS log be kept on board ship?

a.       Captain’s office                                       

b.       sea cabin

c.       At the GMDSS operating position         d. anywhere on board the vessel        

20.  When logging in to the Inmarsat system using Inmarsat-C, it is necessary to

a.       Enter your IMN                           

b.       Enter the CES answer back

c.       Select the ocean region               

d.      Call the CES and inform them that you are operating in the appropriate ocean region

21.  What is the primary function of NCS?

a.      To monitor and control communication through the Inmarsat for which it is responsible

b.      To provide direct communication between the Inmarsat station placing a call and the station receiving the call

c.       To provide multimode communication between the Inmarsat station placing a call and coast radio station that will deliver it

d.      To determine which satellite is best suited to provide communication between the Inmarsat station placing a call and the station receiving a call

22.  Which of the following statement concerning Inmarsat Geostationary satellite is true?

a.       They are in low polar orbit to provide true global coverage

b.      They are in equatorial orbit to provide true global coverage

c.       They provide coverage to vessel in nearly all of the world’s navigable water

d.      Vessel sailing in equatorial water are able to use only one satellite whereas other vessels are able to choose between at least two satellites

23.  Which mode of communication is NOT possible through an Inmarsat -C SES?

a.       Data      b. Telex  c. Emergency activation           d. shore-to-ship facsimile

24.  Which statement is false regarding a distress request?

a.      Any distress request is automatically switched to an Inmarsat distress working frequency

b.      If all the satellite channels are busy, one of them will be preempted by a distress request

c.       The NCS in each ocean region automatically monitoring the processing of such calls by other CES’s in that region and process calls if anomaly exists in that system

d.      Any request message with distress priority is automatically recognize by the CES and satellite channel is instantly assigned

25.  How a distress message is normally initiated through Inmarsat?

a.      All Inmarsat units have a dedicated key that can be pressed for immediate action

b.      By adding the word DISTRESS in the first line of message’s preamble

c.       Certain Inmarsat units have a dedicate key that can be pressed for immediate action while other systems provide menu driven features

d.      By transmitting the distress message on the U.S.Coast Guard’s dedicated monitoring channel

26.  Which of the following two way communication can be made through Inmarsat without charge?

a.       A service message that advise a vessel of other ship traffic in its vicinity

b.      safetyNET

c.       Distress traffic

d.      Vessel position information when the ship’s GPS fails

27.  How is a ship to shore transmission of a distress priority message in most SES’s initiated?

a.      By provision of a distress button or code in the CES

b.      By including priority code in the preamble of the telex message

c.       By including the priority code in the dialed number in voice communication

d.      By initial voice contact with the rescue coordination centre

28.  Upon receipt of safetyNET message of Distress or Urgency category on the ship’s EGC receiver what action is required by the GMDSS radio operator?

a.       No immediate action is required as an audible tone will be generated at the beginning and the end of the transmission and a paper print out of the message will be generated

b.      Manually reset the alarm

c.       No immediate action required by the operator since the transmission will be automatically acknowledged by the receiving vessel

d.      A periodic alarm tone will be heard until the radio operator prints the message from the unit’s memory

29.  For RF communications modulation is best defined as

a.      The combination of information or intelligence with a carrier frequency

b.      Using a single carrier frequency with proper power level

c.       Setting up the receiver with the correct bandwidth to ensure proper communication

d.      The combination of received frequency and oscillator frequency in the mixer

SECTION – B

1.      A) Ship FALCON is informing ship TRAVITA ‘Seelonce Mayday’ which vessel is

the control of the Distress traffic at the moment

SHIP FALCON

b) What action should you take if you receive an Urgency alert call not followed by a message even after waiting for three minutes?

Inform nearby CRS and resume normal working

c) What is the Navtex International broadcast frequency?

518 KHz

d) When you are the controlling distress traffic, state under what circumstances

you will send Mayday Relay message

a.       when a mobile unit in distress can not transmits own distress call/message

b.      when a master or the person responsible for the ship not in distress or

the person in-charge of the land station feels further help is necessary

e) In Satcom-B how many seconds will you press the Distress push button

switch if you want to send a Distress R/T call

5 seconds

f) What is the primary intership working channel on VHF

            CH 06

2.      A) write down the action you will take on sitcom-B telephone for a FIRE in

the E/Room. (assume all information)

            select telephone mode

            lift the handset and listen for dial tone

            select the required LES

            press  and hold the Distress button for at least 5 seconds

            initiate the call by # key

            when connected with MRCC, convey the distress message

            MAYDAY     x  3

            THIS IS

            VARUNA/VWED/324576897/IOR

            36 OO S 081 03 E

            FIRE in ENGINE ROOM

            REQUIRE IMMEDIATE ASSITANCE

            23 PERSONS ARE ON BOARD

            HEAVY SWELL

            MASTER

            OVER

3.      A) write down the full details of Distress alert received on MF freq 2187.5 KHz

Assuming all information

Nature – Fire

MMSI – 915642000

POSITION-

Time – 1100 UTC

Subsequent Communication – SSB TELEPHONY

Date and Time  – 12/07/15 1103 UTC

Frequency _ 2187.5 KHz

b) Under what circumstances will the following signals be used in Radio

Telephony?

(i)                 SEELONCE MAYDAY

(ii)               SEELONCE FEENEE

(iii)             MAYDAY RELAY

(i)                 Imposing silence on interfering station by the controlling station

            During distress traffic

(ii)               Distress traffic is completely over. Normal working can be resumed.

This is announced by the controlling station

(iii)             when a mobile unit in distress can not transmits own distress call/message

when a master or the personsible for the ship not in distress or

the in-charge of the land station feels further help is necessary

4.      Answer the following:

A)    VHF Channel/frequency you will listen to on receiving an alert on CH 70

 CH 16

B)    Distress priority to be used on sat-C when cancelling a false Distress alert and why?

By selecting distress priority we are directly and immediately connected

To RCC

C)    Having used two digit service 38 for a doctor call on sat-B, what signal will

You use preceeding the call/message

PAN PAN

D)    You have sent a Distress alert via sat-c, no reply received. After how long

Will you repeat the alert?

5 minutes

E)    What is the priority number used in sitcom equipment for Distress?

Inmarsat priority 3 (P3)

F)     State a VHF channel and one HF frequency that can be used for ship-aircraft

Communication during SAR?

                        CH 06, 5680 KHz

5.      A) what is the purpose of an EPIRB?

To determine the position of survivors during SAR

B) what does the EPIRB signal indicate?

One or more persons are in distress , they may no longer be on board

And they may not have receiving facility

C) on what frequencies do the following operate:

(i) COSPAS – SARSAT EPIRB

406 MHz, 121.5 MHz

(ii) Inmarsat EPIRB (L Band)

1.6 GHz

(iv)             VHF EPIRB  -

  CH 70

D) state the purpose of SART  

To locate the position of survivors during SAR