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

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The test consisted of 80 random questions.
Total questions on this topic: 198

Your result: 95%

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Right answers:

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

Your answer is correct: Wait three minutes and if no acknowledgement is heard from a coast station you should relay the alert.

Dish aerials are used with:

Your answer is correct: Inmarsat-B and -M.

The sensitivity of a communication receiver can be adjusted with:

Your answer is correct: RF-gain.

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:

Your answer is correct: Semi-duplex.

On the MF/HF transmitter-receiver there is a sensitivity control. Another name for this is:

Your answer is correct: RF-gain.

Which of the following is a ship MMSI?:

Your answer is correct: 227530000.

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.:

Your answer is correct: Urgent call.

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

Your answer is correct: Time (in UTC) whereupon the telex for the subscriber is delivered.

Is it necessary to state the accounting code of the vessel in fully automated radio telex-traffic with a coast-station?:

Your answer is correct: Yes.

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

Your answer is correct: Always with the coast station.

A SART must be visible on the ship’s radar from a distance of at least:

Your answer is correct: 5 miles.

Modulation is:

Your answer is correct: Blending LF & HF signals.

In radio telephony what is the “URGENCY CALL” which should be used to indicate that you have a very urgent message to transmit concerning the safety of another vessel or person?:

Your answer is correct: PAN-PAN (3 times).

The word CHANNEL is spelled conform the international phonetic alphabet:

Your answer is correct: Charlie, Hotel, Alfa, November, November, Echo, Lima.

You have an important navigational or meteorological warning to transmit. What call should proceed this message when made on the radio telephone?:

Your answer is correct: SECURITE SECURITE (3 times).

What do you understand by the initials EPIRB?:

Your answer is correct: This means: Emergency Position Indicating Radio Beacon.

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

Your answer is correct: A, B, D.

Inmarsat is short for:

Correct answer: International Maritime Satellite Organisation.

Your Answer: International Maritime Satellite System.

The different layers in the ionosphere, important for radio propagation, are effected by:

Your answer is correct: The Sun.

To get proper conversation discipline in maritime radio traffic:

Your answer is correct: Only necessary radio conversations are made in a concise and businesslike way.

A distress alert on board may only be transmitted on explicit order of:

Your answer is correct: The captain.

Is it necessary to state the accounting code of the vessel in fully automated radio telex-traffic with a coast-station?:

Your answer is correct: Yes.

Which of the following frequency bands would most likely provide reliable communication between two stations that are 15 miles apart?:

Your answer is correct: The Very High Frequency (VHF) band.

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

Your answer is correct: Listen out on VHF channel 16.

The following information must be given on the SART:

Your answer is correct: Date of replacement of the batteries.

The hydrostatic release of an EPIRB should be changed:

Your answer is correct: Every 2 years.

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

Your answer is correct: You set watch on VHF channel 16.

The Inmarsat-satellites are located:

Your answer is correct: Above the equator.

In maritime communication two international treaties are primarily involved. They are:

Your answer is correct: The IMO at London and the ITU at Geneva.

Onboard the following message is received on the DSC controller: DOO: 245329000 CH16; S distress ack 244123000. What station sent the distress acknowledgement?:

Your answer is correct: 245329000.

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

Your answer is correct: NAVTEX and EGC-receiver.

What statement is correct with frequency modulation?:

Your answer is correct: Frequency modulation is often applied in the maritime VHF-range (band).

With maintenance of batteries it is of primary importance that:

Your answer is correct: The space where the batteries are stored is properly ventilated.

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

Your answer is correct: All Stations – This is “SAINT-ROMAIN”.

VHF channel 15 is:

Your answer is correct: Inter-ship channel.

How are the NAVTEX areas identified?:

Your answer is correct: By two letters.

The batteries must be placed in a well ventilated place, so that:

Correct answer: The detonating gas can be discharged.

Your Answer: The production of detonating gas can be prevented.

One can check the functioning of the SART by:

Your answer is correct: Activating the SART and checking the effect on the radar screen.

What is the meaning of the abbreviation “RQ” at the end of a DSC sequence?:

Your answer is correct: Acknowledgement request.

Moored in a harbour, transmitting with a mariphone is:

Your answer is correct: Always allowed.

A VHF transmission range is mainly determined by:

Your answer is correct: The height of the aerial.

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?:

Your answer is correct: S O S (Telegraphy) / MAYDAY (Telephony).

Which International Convention introduced the GMDSS?:

Your answer is correct: SOLAS.

A DSC distress alert is received. The message states that communication by radiotelex is prefered. One preferably uses:

Your answer is correct: FEC mode.

What information has to be given to set up a radio telex-connection with a coast-station:

Your answer is correct: ARQ followed by the coast-station’s ID-number.

What is the purpose of the radiotelephony two tone alarm?:

Your answer is correct: Activate bridge watchkeeping receivers and attract the attention of the person on watch.

Dish aerials are used with:

Your answer is correct: Inmarsat-B and -M.

With an EPIRB:

Your answer is correct: You must check the date the battery must be replaced.

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

Your answer is correct: Send a PDN, if the message has arrived in the mailbox.

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

Your answer is correct: 518 kHz.

What is SITREP an abbreviation for:

Your answer is correct: Situation Report.

What is the emergency frequency on MF (Medium Frequency) radio?:

Your answer is correct: 2 182 Hz.

What HF-band is generally suitable for long distance transmission if one of two stations is Located in twilight?:

Your answer is correct: 12 MHz.

The ship-shore HF-telephone-channel 2 228 consists of the frequencies 22 081,0 kHz and 22 777,0 kHz. In case of manual operation, one should tune the receiver on:

Your answer is correct: 22 777,0 kHz.

Which word will precede an urgency message?:

Your answer is correct: PAN-PAN.

By the degree of selectivity of a receiver is meant:

Your answer is correct: Ability to make weak stations audible.

The normal mode of operation for each coast station shall be indicated in:

Your answer is correct: The ITU List of Coast Station.

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

Your answer is correct: A possibility to receive MSI.

The MERSAR is:

Your answer is correct: A book of directions for search and rescue at sea.

Long distance communication in the HF-bands depends on:

Your answer is correct: Ionisation layers.

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

Your answer is correct: 8 MHz.

The ideal aerial length depends on:

Correct answer: The frequency chosen.

Your Answer: The modulation form chosen.

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?:

Your answer is correct: Seelonce Distress.

If requested by a coastal radio station to participate in a rescue operation, what is the most important information you may give?:

Your answer is correct: Your position, name, call sign and speed.

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

Your answer is correct: A possibility to receive MSI.

MF communication is usually provided by:

Your answer is correct: Ground wave.

If a coast-station doesn’t answer a call on VHF working channel or doesn’t send a reply signal:

Your answer is correct: You must call on another working channel.

The MF/HF-transceiver on board is tuned to the assigned frequency of a station. To make this connection the following mode is used:

Correct answer: J3E.

Your Answer: H3E.

On which frequency a ship must maintain a continuous watch when sailing in area A2?:

Your answer is correct: 2 187,5 kHz.

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

Your answer is correct: The amount of ionisation.

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

Your answer is correct: ASCII.

Reflection of radio waves in the ionosphere depends on:

Your answer is correct: Sunspots.

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

Your answer is correct: 60 Ah.

The Satellite orbit in the Cospas-Sarsat system is:

Your answer is correct: Polar.

Of the AM-signal:

Your answer is correct: Amplitude is variable and frequency of the carrier wave is constant.

The number of oscillations of a wave per seconds is called:

Your answer is correct: Frequency.

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

Your answer is correct: Measured by the “dopler” shift in the signals.

The safety message announces that a station:

Your answer is correct: Will relay a message concerning an important navigational or meteorological warning.

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

Your answer is correct: A, B, D.

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

Your answer is correct: SES or an EGC receiver.

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