NOTES FOR INMARSAT ON BOARD

Number of ocean region covered by inmarsat: *a.. Ocean code for telex in the Indian Ocean region; a.. Number of satellite control center in the inmarsat system; *a.. Number of network

REVIEWER FOR INMARSAT

1 Inmarsat provides satellite coverage up to:

a 70 degrees

b 50 degrees

*c 75 degrees

2 An advantage in the use of inmarsat satellites over terrestrial

communications:

a enhanced group call

b global communication

*c both A and B

3 In sending a telegram thru the inmarsat system to countries where there

are no telex facilities, use 15+ to be assured of delivery as well as

format in accordance with:

a STCW

b IMO

*c CCITT

4 Connects space segments with the national and international fixed

telecommunications networks:

*a land earth stations

b satellite

c network control center

5 Year inmarsat became fully operational:

*a 1982

b 1979

c 1985

6 Diameter of typical inmarsat LES steerable parabolic antenna:

a between 1 to 4 meters

b between 5 to 7 meters

*c between 11 to 14 meters

7 Official languages authorized by inmarsat for use in sending distress

message:

*a english

b french

c spanish

8 Shore-to-ship communications from the satellite-to-ship:

*a 1.6 GHz band

b 4.0 GHz band

c 1.5 GHz band

9 Inmarsat provides communication for:

a air

b land

c sea

*d all of the above

10 Number of ocean region covered by inmarsat:

*a four

b three

c five

11 Another name for ship earth station:

a coast earth station

b satellite control system

*c mobile earth station

12 Located at the inmarsat hadquarters in london which monitors,coordinates

and controls the operational network activities of all the satellite in

the network:

*a Network control center (NCC)

b land earth station (LES)

c Network coordination station (NCS)

13 Ship-to-shore communications from SES to satellite:

a 6 GHz band

b 4 GHz band

*c 1.6 GHz band

14 Ship-to-shore communication from the satellite to LES:

*a 4 GHz band

b 6 GHz band

c 1.5 GHz band

15 Most economical facility of inmarsat A in transmitting volume data:

a telex

*b high speed data

c facsimile

16 Shore-to-ship communication from LES to satellite

*a 6 GHz band

b 4 GHz band

c 1.5 GHz band

17 Inmarsat council is compossed of:

a 18 members

b 20 members

*c 22 members

18 Ocean code for telex in the Indian Ocean region;

a 582

b 584

*c 583

19 Number of satellite control center in the inmarsat system;

*a 1

b 2

c 4

20 Year Inmarsat was established:

a 1982

b 1976

*c 1979

21 Inmarsat terminal/model which transmit information on store and forward:

a Inmarsat A

*b Inmarsat C

c Inmarsat B

22 Inmarsat model under development for introduction in early 1992:

*a Inmarsat B & M

b Inmarsat A & C

c Inmarsat A & P

23 Minimum investment share with inmarsat:

a 0.10% = US $ 25,000

b 0.25% = US $ 50,000

*c 0.05% = US $ 18,000

24 Number of official languages adopted by inmarsat:

a one

b three

*c four

25 Computes and collects payments for the use of inmarsat satellite system:

*a L.E.S owners

b IMMARSAT

c INMARSAT agent

26 Size in diameter of an Inmarsat A antenna:

*a approx 1 meter

b approx 4 meters

c approx 0.5 meter

27 Ocean code for telephone in the Indian Ocean region:

a 872

*b 873

c 874

28 Ocean code for telephone in the atlantic ocean region-East:

a 884

*b 871

c 872

29 The emergency priority button shall only be used when the vessel;

a sends an urgent message

*b is in real distress

c sends message everytime

30 A system of data transmission which Inmarsat-C had adopted where data

received by LES/CES processed, and stored for retransmission:

*a store and forward

b direct transmission

c processed transmission

31 Number of network coordination station in every ocean region covered by

Inmarsat:

*a one

b two

c three

32 Inmarsat service which uses the EGC system in broadcasting maritime

safety information:

a fleetNET

b fishNET

*c safetyNET

33 Inmarsat service which uses the EGC system in addressing commercial

information in a single group call:

*a fleetNET

b safetyNET

c fishNET

34 Inmarsat C facility which addresses messages to predetermined group of

ships or vessels in both fixed and variable geographical areas:

*a enhanced group call (EGC)

b several calls

c all vessels call

35 Speed of inmarsat satellite:

a 10,000 MPH

*b 7,000 MPH

c 25,000 MPH

36 The four operational satellites of the Inmarsat system operate in

geostationary orbit 35,700 Km in line with the;

a poles

*b equator

c meridian

37 Modern inmarsat antennas are equipped with:

*a auto tracking

b manual tracking

c semi-manual tracking

38 Message which has the priority for transmission:

a safety

b urgent

*c distress

39 Inmarsat terminals upon purchase should be:

*a commissioned

b use immediately

c warmed-up

40 An inmarsat system components which assigns channel upon request from an Inmarsat terminal to gain access thru the system;

a NCC

b SCC

*c NCS

41 Distress message priority code:

a 1

*b 3

c 2

42 Number of network co-ordination station in the inmarsat system:

a 5

b 1

*c 4

43 Currencies and exchange rates use in Inmarsat bills:

*a Gold France and special drawing right

b US$ dollar

c Sterling pounds

44 An element of GMDSS:

*a Inmarsat C

b Maritex

c SITOR

45 Number of network control centre in the Inmarsat system:

a 4

*b 1

c 3

46 What should be done, when a vessel equiped with Inmarsat A enters a new Inmarsat satellite coverage:

*a re-orient antenna with the satellite

b contact the LES

c call Inmarsat

47 Located in each ocean region which acts as a type of switch operator,

assigning,controlling and monitoring all of the telephone and telex

channels between the SESs and the CESs for its ocean region:

*a Network coordination station

b Coast Earth station

c Network Control center

48 The horizontal movement of the antenna clockwise or counter clockwise

is called:

a azimuth angle

*b azimuth movement

c azimuth limit

49 With the enhanced group call facility that inmarsat C provides the

number of ships which can receive the message being transmitted:

*a no limitation

b has limitation

c has specific number

50 Inmarsat terminal where facsimile facility is provided by LES thus there

is no need to have a FAX machine for message to be received in FAX form: *a Inmarsat-C

b Inmarsat-B

c Inmarsat-A

51 Inmarsat C terminal transmits information rate at:

a 2,400 BPS

b 50 BPS

*c 600 BPS

52 What should be done to obtain access with the inmarsat system with the

use of Inmarsat-A:

a Dial NCS ID

b Dial NCC ID

*c Dial LES ID

53 Inmarsat-A provides aside from telephony,facsimile,telex and:

*a high speed data

b low speed data

c slow speed data

54 Inmarsat Duplex high speed data service which can be used for video

conferencing:

*a 64 kbitsec

b 9.6 kbitsec

c 56 kbitsec

55 Capable of receiving Maritime safety information automatically,just like

Inmarsat-C, in some navigational areas:

a Sitor

*b Navtex

c Maritex

56 Inmarsat system/model which provide communication thru telephony,

facsimile, telex, high speed data:

a Inmarsat-C

*b Inmarsat-A

c Inmarsat-P

57 A facility of inmarsat-A terminal which provides the length of time

Inmarsat system was used:

*a call accounting

b printer

c print-out

58 Location of both the network control center and the satellite control

center:

a Goonhilly southwest of england

*b Inmarsat headquarters in london

c Distributed in each ocean region

59 An inmarsat-A on board a vessel at pacific ocean addressed a call to

another inmarsat-A to a vessel in the indian ocean the process by which

the signal travels from one terminal to the other is called:

a signal process

b single hop

*c double hop

60 An airplane, a vessel or a train equipped with inmarsat, mobile earth

station:

a should not be in motion to received messages

*b could receive messages while in motion

c redirect course to receive messages

61 Possible cause for inmarsat to decommission inmarsat-C terminal:

a incorrect positioning of antenna

*b incorrect operation

c delayed log-in

62 A sub-system of inmarsat which connects the inmarsat satellites with the

landline telecommunications:

a Satellite control center

*b Coast Earth Station

c Network co-ordinating center

63 Capable of receiving Maritime safety information near global

automatically:

a SITOR

*b Navtex

c Inmarsat-C

64 What should be done when a vessel equipped with inmarsat-C enters a new Inmarsat satellite area coverage:

a re-orient the antenna

b call the LES

*c log-in with the NCS

65 The ship earth station is one of the components of inmarsat system which

can communicate with any landline fixed telecommunication firstly by:

a getting an assignment from inmarsat

b NCC control

*c obtaining access with the system

66 What should be done when a vessel equipped with inmarsat-C enters

pacific ocean region after it leaves indian ocean region:

*a log-out IOR and log-in POR

b re-orient its antenna to POR

c do nothing because the antenna is omni directional

67 Ocean code for telex in the atlantic ocean region-west:

*a 584

b 582

c 583

68 Main purpose why must the inmarsat satellite have to maintain a speed

of 7,000 MPH:

*a to maintain its geostationary orbit

b to prevent the satellite from falling into the earth

c to prevent the satellite from going to the moon

69 An inmarsat terminal whose toll charge is computed based on number of

Bps or kilobit:

a inmarsat-A

*b inmarsat-C

c inmarsat-B

70 Ocean code for telex in the atlantic ocean region-east:

a 584

b 583

*c 581

71 One of the characteristics of inmarsat-C terminal:

*a half-duplex

b full duplex

c triplex

72 As the earth rotates on its axis, the inmarsat satellites moves at 7,000

MPH to maintain its geostationary orbit Nevertheless, intances takes

place where the satellites deviates from its assign fixed position What

particular components of the inmarsat system whose function is to bring

back the satellite to its assigned fixed position:

*a Satellite control center

b Coast earth station

c Network control center

73 When a telephone call is placed to a vessel equiped with Inmarsat-A to

gain access:

*a use ocean code

b use country code

c use area code

74 Before a distress message is sent a priority call should be requested by:

*a pressing the emergency button

b placing a call with the LES

c call inmarsat

75 Inmarsat maritime help line:

a telex number 820325 INMHLP G

b telex number 750659 INMHLP G

*c telex number 920327 INMHLP G

76 Process by which inmarsat terminal is tested for the first time upon

installation before commercial operation could be done:

a initialization

b warning

*c commissioning

77 Acronym for international maritime satellite organization:

*a Inmarsat

b Marisat

c Inmarsator

d none of the above

78 Inmarsat operates:

a for profit

b as a foundation

*c not for profit

79 In sending message thru inmarsat-C the space in between words are:

a free of charge

b double charge

*c counted as one character and are included in the charge

80 The lowest cost among all inmarsat terminals except inmarsat-P:

a inmarsat-A

*b inmarsat-M

c inmarsat-C

81 An inmarsat system design which gave the Inmarsat-B terminal a better

quality than inmarsat-A:

a digital

b analogue

*c full duplex

82 Inmarsat new generation satellites have a life span of:

*a 10 years

b 7 years

c 15 years

83 Inmarsat satellite provide data communication up to:

*a 70 degrees N or S Latitude

b 75 degrees N or S Latitude

c 80 degrees N or S Latitude

84 Inmarsat-A terminal toll charge for telex, facsimile or high speed data

is based on:

*a time length

b characters

c numbers or words

85 Strictly prohibited by inmarsat:

a sell inmarsat terminal

b failure to log-out

*c sends false distress alarm

86 An inmarsat terminal which could receive messages stored for several

hours or days after logging in coming from in-operative period:

a inmarsat-C

b inmarsat-A

*c inmarsat-B

87 An inmarsat terminal which will eventually replace inmarsat-A:

a inmarsat-M

b inmarsat-C

*c inmarsat-B

88 Complete privacy or secured communication with the use of inmarsat

system is possible when:

a one inmarsat terminal is on the other side of the communication

b when landbase communication sstem is connected with inmarsat

*c two inmarsat terminals are on both ends of the inmarsat communication

system

89 The enhanced group call facility that inmarsat provides, ship addressed

but located in different ocean regions:

a could receive message with slight delay after the other

*b could receive message simultaneously

c is not possible

90 In what orbit where the inmarsat satellites positioned 35,700 KM above

the equator:

a low flying

*b geostationary

c fast orbit

91 With the use of inmarsat-A terminal the strenght of signal from the

satellite as could be seen from the EU or BDE depends upon:

a the elevation angle from 05 degrees to 90 degrees N or S

b the azimuth angle

*c how the antenna had been focused with the satellite

92 With the use of Inmarsat-A telex facility, what sign gives you a signal

that you can send your telex thru the system:

*a GA+

b WRU

c HR IS

93 In re-orienting the antenna of the inmarsat-A terminal auto track is not

advisable when the position of the vessel is:

a at 5 degrees elevation angle

b partly obstruct the antenna from either one of the satellites

*c covered by overlapping satellites equi-distant to the vessel

94 In the absenceof electronic power or power failure from the generator

set, a 24 volts car battery can be a substitute to run an inmarsat

terminal What is needed in order that a car battery could be used:

a converter

b transformer

*c inverter

95 Ocean code for telephone in the atlantic ocean region-west:

a 872

b 873

*c 874

96 Year when inmarsat-A terminal could no longer be used:

*a 2006

b 1999

c 2005

97 Ocean code for telephone in the pacific ocean region:

*a 872

b 871

c 873

98 There are navigational areas where there are two or three satellites

overlapping each other's coverage Under this situation, the mariners

have the discretion to use:

a no discretion but to use satellite where they were formerly oriented

*b any of the satellites

c no discretion but to use the satellite with the highest elevation

angle

99 Ocean code for telex in the pacific ocean region:

*a 582

b 581

c 583

100.The electronic unit component of the inmarsat terminal is sometimes

referred to as:

a ADE

*b BDE

c CDE