Тест по Officers onboard about Radio Communication (GMDSS) (CES v6.0)

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Правильные ответы:
1

The word NAVTEX is spelled conform the international phonetic alphabet:

Ваш ответ правильный: November, Alfa, Victor, Tango, Echo, X-ray.
2

In the Inmarsat Maritime Communications Handbook one can find information about:

Ваш ответ правильный: 2 digit code telex services.
3

If messages are received which aren’t intended for own ship:

Ваш ответ правильный: They must not be used for any purpose.
4

You wish to send an e-mail using the Inmarsat-C installation. The message has to be composed in:

Ваш ответ правильный: ASCII.
5

When a DSC-message of the “distress” category is received, in order to start distress alert communication in so far as not indicated in the alert, you will switch to VHF channel:

Ваш ответ правильный: 16.
6

An area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available is called:

Ваш ответ правильный: A1.
7

By the term “Stand by” the operator of a coast-station means that one should:

Ваш ответ правильный: Wait until the coast-station calls again.
8

With an Inmarsat-C installation there is the addressing-option “special”. Via this option:

Ваш ответ правильный: Give one of Inmarsat’s “special access codes”.
9

What are the NAVTEX messages categories which cannot be suppressed?:

Ваш ответ правильный: A, B, D.
10

In the Maritime Radio Traffic the order of priority is:

Ваш ответ правильный: Distress traffic, urgency traffic, safety traffic.
11

The correct functioning of a DSC-modem can be checked by means of:

Ваш ответ правильный: The built-in test facility in the modem.
12

According to the rules of GMDSS vessels one must be able to receive MSI with the aid of:

Ваш ответ правильный: NAVTEX and EGC-receiver.
13

MF communication is usually provided by:

Ваш ответ правильный: Ground wave.
14

In what HF-band is long distance transmission possible when both stations are located in Darkness?:

Ваш ответ правильный: 8 MHz.
15

How will you start a cancelling message after you send by mistake a distress call on your VHF DSC equipment?:

Ваш ответ правильный: All Stations – This is “SAINT-ROMAIN”.
16

The prescribed test of an approved portable VHF radio set (portophone) must be done once a:

Ваш ответ правильный: Month.
17

What is the proper term used to describe a coast radio station that primarily handles chargeable ship-to-shore message traffic of a routine nature?:

Ваш ответ правильный: Public Correspondence Station.
18

Define the class of emission H3E:

Правильный ответ: Radiotelephony – Single sideband full carrier.
Ваш ответ: Radiotelephony – Frequency modulation.
19

Distress MF communications should normally be operated:

Правильный ответ: In J3E mode – on simplex basis.
Ваш ответ: In J3E mode – on duplex basis.
20

The ideal aerial length depends on:

Ваш ответ правильный: The frequency chosen.
21

Dish aerials are used with:

Ваш ответ правильный: Inmarsat-B and -M.
22

The type of Inmarsat station A, B, C, M is recognized by:

Правильный ответ: The first digit of the identification.
Ваш ответ: The first two digits of the identification.
23

The battery of an EPIRB should be changed:

Ваш ответ правильный: Every 4 years.
24

The typical “daylight-frequencies” for long distance transmission are located in the:

Ваш ответ правильный: 16 or 22 MHz-band.
25

With an EPIRB:

Ваш ответ правильный: You must check the date the battery must be replaced.
26

Which word will precede a routine message?:

Ваш ответ правильный: No specific word will precede a routine message.
27

A DSC-notice should be sent on VHF-channel:

Правильный ответ: 70.
Ваш ответ: 67.
28

Long distance communication in the HF-bands depends on:

Правильный ответ: Ionisation layers.
Ваш ответ: Ground wave.
29

On area A3 the function “Transmission and reception of signals for locating” is mainly based on:

Правильный ответ: The use of SART transponders.
Ваш ответ: The use of MF DSC.
30

What do you understand by the initials EPIRB?:

Ваш ответ правильный: This means: Emergency Position Indicating Radio Beacon.
31

The squelch on the control panel of a VHF-sat serves to:

Ваш ответ правильный: Adjust the threshold level for admitting signals and refusing noise.
32

At the entrance to the space where batteries are stored on board the following notice must be fitted:

Ваш ответ правильный: No entry with naked light and/or flame.
33

By FleetNET communication is understood:

Ваш ответ правильный: An EGC-message destined for ships with the same group call number.
34

The ID of an Inmarsat-M station on board starts with:

Ваш ответ правильный: 6.
35

In the traffic list a coast-station indicates that there is a radio telex-message for a vessel. To call for the message one should put in:

Ваш ответ правильный: After ga + the radio telex-command msg + ?
36

With what system is a NAVTEX-message transmitted?:

Ваш ответ правильный: FEC.
37

Automatic amplifier regulation is used for the following reasons:

Правильный ответ: With weak incoming signals distortion is reduced.
Ваш ответ: With absence of incoming signals noise is reduced.
38

A battery of 24 Volt supplies during 10 hours a current of 6 ampere. What is the capacity supplied?:

Ваш ответ правильный: 60 Ah.
39

The altitude effect of the reflection of radio waves in the ionosphere on the transmission range also depends on:

Ваш ответ правильный: The day/night situation.
40

The MERSAR is:

Ваш ответ правильный: A book of directions for search and rescue at sea.
41

An area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available is called:

Ваш ответ правильный: A1.
42

What do you do after receiving a VHF DSC DISTRESS call?:

Ваш ответ правильный: You set watch on VHF channel 16.
43

What are the NAVTEX messages categories which cannot be suppressed?:

Ваш ответ правильный: A, B, D.
44

The sensitivity of a communication receiver can be adjusted with:

Правильный ответ: RF-gain.
Ваш ответ: Clarifier.
45

Which wave length applies to a frequency of 2 000 kHz?:

Ваш ответ правильный: 150 mtr.
46

With help of DSC a ship wants to contact a coast-station to have a question for telephone call. One has to choose from the following DSC-frequencies:

Ваш ответ правильный: TX: 8 415,0 kHz RX:8 436,5 kHz.
47

According to the rules of GMDSS all vessels have to be equipped with:

Ваш ответ правильный: A possibility to receive MSI.
48

On area A4 the function “Transmission of ship to shore distress alerts” is mainly based on:

Ваш ответ правильный: The use of HF DSC and COSPAS SARSAT Epirbs.
49

The frequency 121,5 MHz is used for:

Ваш ответ правильный: SARSAT-COSPAS EPIRBS.
50

On area A1 the function “Reception of shore to ship distress alerts” is mainly based on:

Ваш ответ правильный: The use of VHF DSC.
51

The DSC-controller display the following: DOO: 244562000 CH16; S distress sinking. After receiving this DSC message the following is done immediately:

Ваш ответ правильный: Listen out on VHF channel 16.
52

On board you have to switch from transmitting to receiving and vice versa. The shore station can transmit and receive simultaneously. You are working with two different frequencies. This method is called:

Ваш ответ правильный: Semi-duplex.
53

If a ship according to the rules of GMDSS is equipped with an MF/HF radio set a DSC listening watch must be kept on:

Ваш ответ правильный: 8 414,5 kHz and on at least one of the following DSC frequencies: 4 207,5 kHz, 6 312,0 kHz, 12 577,0 kHz or 16 804,5 kHz.
54

One can check the functioning of the SART by:

Ваш ответ правильный: Activating the SART and checking the effect on the radar screen.
55

Of the AM-signal:

Ваш ответ правильный: Amplitude is variable and frequency of the carrier wave is constant.
56

For a DSC-connection (no “distress alert”) with another vessel the following frequencies are used:

Ваш ответ правильный: TX: 2 177,0 kHz RX: 2 177,0 kHz.
57

Which of the following frequencies is used by the NAVTEX system?:

Ваш ответ правильный: 518 kHz.
58

To receive distress alerting and MSI via an Inmarsat-C set vessels must have:

Ваш ответ правильный: SES or an EGC receiver.
59

The emergency battery of a GMDSS portophone:

Ваш ответ правильный: Must be replaced before the expiry date is exceeded.
60

The distress message is used when the vessel is threatened by a serious and imminent danger and is in need of immediate assistance. What is the telegraphy and telephony distress message like?:

Ваш ответ правильный: S O S (Telegraphy) / MAYDAY (Telephony).
61

How often must inspection of proper working of the EPIRB’s and SART’s take place on board? Once per:

Ваш ответ правильный: Month.
62

DSC uses for automatic identification the MMSI. The identification 002442000 is assigned to:

Ваш ответ правильный: A coast-station or coast guard-station.
63

At the end of a radio telex-connection, when a “store and forward” message has been transmitted, the coast-station at least gives a:

Ваш ответ правильный: Time (in UTC) whereupon the telex for the subscriber is delivered.
64

When on HF band a DSC distress alert is received, you have to listen to:

Ваш ответ правильный: The radio telephony distress frequency in the band in which the DSC distress alert was received.
65

By frequency is meant:

Ваш ответ правильный: Number of vibrations per unit of time.
66

Which type of call will be sent by a ship adrift and needing the assistance of a tug? The weather is not bad and the ship will be aground 24 hours later.:

Ваш ответ правильный: Urgent call.
67

In radio-telex distress traffic preference is given to FEC because:

Ваш ответ правильный: Everybody can read along.
68

Which of the following is a ship MMSI?:

Ваш ответ правильный: 227530000.
69

A VHF transmission range is mainly determined by:

Ваш ответ правильный: The height of the aerial.
70

Which of the following is a Accounting Authority Identification Code?:

Ваш ответ правильный: FR01.
71

The compulsory testing of a prescribed EPIRB is to be done:

Ваш ответ правильный: Once a month.
72

The position of a 406 MHz Cospas-Sarsat EPIRB is:

Ваш ответ правильный: Measured by the “dopler” shift in the signals.
73

Via Inmarsat-C a message is sent to an Inmarsat-C mailbox with a positive delivery notification (PDN). The ground station will:

Ваш ответ правильный: Send a PDN, if the message has arrived in the mailbox.
74

Command of radio-traffic between vessels and coast stations lies:

Ваш ответ правильный: Always with the coast station.
75

You receive a distress alert on HF Radio. What should you do?:

Ваш ответ правильный: Wait three minutes and if no acknowledgement is heard from a coast station you should relay the alert.
76

The word CHANNEL is spelled conform the international phonetic alphabet:

Ваш ответ правильный: Charlie, Hotel, Alfa, November, November, Echo, Lima.
77

Which word will precede a safety message?:

Ваш ответ правильный: SECURITY.
78

Your vessel is not in distress and not taking part in a distress operation. How would you impose radio silence on vessels which are interfering the distress traffic?:

Ваш ответ правильный: Seelonce Distress.
79

The wavelength of a radio-signal reflected against the F-layer may be:

Ваш ответ правильный: 15 m.
80

Which of the following services is not provided by Inmarsat-C?:

Ваш ответ правильный: Telephone.