The prescribed periodic tests of the radio set must be entered in:
Manual maritime radio communication.
In radio-telex distress traffic preference is given to FEC because:
The system automatically requests repetition when reception garbled.
Everybody can read along.
Is it necessary to state the accounting code of the vessel in fully automated radio telex-traffic with a coast-station?
No, when AAIC is unknown, it will be asked for.
No, because the AAIC is included in the radio telex-identification.
It depend upon your location.
DSC uses for automatic identification the MMSI. The identification 002442000 is assigned to:
A coast-station or coast guard-station.
What information has to be given to set up a radio telex-connection with a coast-station:
Telex number of the coast station.
FEC followed by the telex country-code of the coast-station.
ARQ followed by the call sign of the coast station.
ARQ followed by the coast-station’s ID-number.
The prescribed test of EPIRB, SART and portable VHF radio set must be entered in:
According to the rules of GMDSS all vessels have to be equipped with:
At least three mariphones.
A possibility to receive MSI.
The number of oscillations of a wave per seconds is called:
When a satellite receives a “distress alert” from a Cospas-Sarsat EPIRB, the relay of the “distress alert” can be delayed because the satellite cannot immediately contact a:
LES before the satellite is actually seen by this ground station.
LUT before the satellite is actually seen by this ground station.
NCS before the satellite is actually seen by this ground station.
What is the acronym FR 01?
What is the two letter signal, to be used by flags, radiotelephony or radiotelegraphy, meaning “Calling All Ships”?
Which word will precede a safety message?
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:
In maritime communication two international treaties are primarily involved. They are:
SOLAS and the international treaty for messaging.
The IMO at London and the ITU at Geneva.
GMDSS hand book and MERSAR.
According to the rule of GMDSS, channel 70 is used for:
Distress and urgency traffic.
The identification of a coast station is composed as follows:
33 followed by the MID number.
00 followed by an MID-number and station number.
00 followed by an MID-number.
00 followed by an MMSI-number.
A VHF transmission range is mainly determined by:
The height of the aerial.
The transmission power, propagation and the quality of the receiver.
Whether it is radio-telephony, radio-telex or DSC.
The DSC-controller display the following: DOO: 244562000 CH16; S distress sinking. After receiving this DSC message the following is done immediately:
Give a “DSC-acknowledgement”.
Listen out on VHF channel 16.
Send a “distress alert relay”.
By the degree of selectivity of a receiver is meant:
Ability to receive all signals.
Ability to prevent variations in the strength of radio frequency signal received.
Ability to make weak stations audible.
Ability to distinguish weak stations from adjacent stronger stations.
On area A2 the function “Transmission of ship to shore distress alerts” is mainly based on:
The use of INMARSAT Epirbs.
The use of SARSAT COSPAS Epirbs.
The safety message announces that a station:
Is going to be under repairs.
Is in serious and imminent danger and needs immediate assistance.
Will relay a message concerning an important navigational or meteorological warning.
Has an very urgent message concerning the safety of a vessel, a plane or another means of conveyance.
You want to send a DSC-call in connection with a shore telephone-call. You must choose:
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?
Network Coordination Station.
Public Correspondence Station.
The ideal aerial length depends on:
The modulation form chosen.
The class of transmission.
For how long time should a SART transponder be able to operate in the active mode?
A distress-call, onboard via RCC, may only be given Receipt if:
OSC from the RCC concerned invites the vessels.
The OOW deems it necessary.
At the end of a radio telex-connection, when a “store and forward” message has been transmitted, the coast-station at least gives a:
Time (in UTC) whereupon the telex for the subscriber is delivered.
Approximate time when telex will be delivered.
Code in letters which will be repeated when the telex has been delivered to the subscriber.
To receive distress alerting and MSI via an Inmarsat-C set vessels must have:
A radio officer on board.
MF/HF radio telex scanner with printer.
Suitable for 518 kHz NAVTEX receiver.
The Inmarsat-satellites are located:
In a geostationary orbit at approximally 1 000 km Altitude.
Between Lat 70° N and 70° S.
Alternatively above the poles and the equator.
If a coast-station doesn’t answer a call on VHF working channel or doesn’t send a reply signal:
You can repeat your call after 2 minutes.
You must call on distress channel.
You must call on another working channel.
You can repeat your call immediately when convinced that no other radio traffic is interfered with.
Which of the following frequency bands would most likely provide reliable communication between two stations that are 15 miles apart?
The Very High Frequency (VHF) band.
The Medium Frequency (MF) band.
The High Frequency (HF) band.
The Low Frequency (LF) band.
Dish aerials are used with:
Command of radio-traffic between vessels and coast stations lies:
Always with the coast station.
With the station that calls.
Which equipment will detect a signal from a SART transponder?
One can check the functioning of the SART by:
Activating the SART and checking the effect on the radar screen.
Removing it from the holder and turning the SART upside down.
Lowering SART in to the sea.
Activating it by extracting the antenna.
The frequency 121,5 MHz is used for:
How are the NAVTEX areas identified?
By one letter and one digit.
To choose the HF-band, the time difference between 2 stations:
Is multiplied by the hour at the transmitting station.
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?
SECURITE-SECURITE (3 times).
The Satellite orbit in the Cospas-Sarsat system is:
On board one can use the reflections in the ionosphere by the right choice of:
The length of the aerial.
The time of transmission.
The mode of transmission.
Moored in a harbour, transmitting with a mariphone is:
Allowed in emergency only.
Allowed in consultation with harbour master.
How often must inspection of proper working of the EPIRB’s and SART’s take place on board? Once per:
On the MF/HF transmitter-receiver there is a sensitivity control. Another name for this is:
Which of the following services is not provided by Inmarsat-C?
The different layers in the ionosphere, important for radio propagation, are effected by:
Direction of the antenna.
The distance between the transmitter and the receiver.
The ID of an Inmarsat-M station on board starts with:
Which of the following is a coast station MMSI?
The correct functioning of a DSC-modem can be checked by means of:
The built-in test facility in the modem.
Tester provided with the equipment.
The obligatory monthly transmission from the RCC’s.
The testing-mode of the ever present VHF-DSC-EPIRB.
What does the abbreviation DSC means?
Distress and safety call.
Is it necessary to state the accounting code of the vessel in fully automated radio telex-traffic with a coast-station?
No, because the AAIC is included in the radio telex-identification.
No, when AAIC is unknown, it will be asked for.
It depend upon your location.
A DSC distress alert is received. The message states that communication by radiotelex is prefered. One preferably uses:
What is the most important factor influencing the HF range?
The power of the transmitter.
Which word will precede a routine message?
No specific word will precede a routine message.
A distress alert sent by Inmarsat to an RCC is sent via:
Of the AM-signal:
Amplitude and frequency of the carrier wave are constant.
Both amplitude and frequency of the carrier wave are variable.
Is not dependent on the frequency and amplitude.
Amplitude is variable and frequency of the carrier wave is constant.
When sending an OBS (weather report) with Inmarsat one should use Service Code “41”. With this address the weather report will always be transmitted to:
The meteorological office of the ship’s flag state.
MET office Washington, this office will take care of further dispatch of the weather reports.
The meteorological station connected with the CES used.
Define the class of emission H3E:
Radiotelex and DSC – Frequency shift keying of carrier with error correction.
Radiotelex and DSC – Frequency shift keying of sub-carrier with error correction.
Radiotelephony – Single sideband full carrier.
Radiotelephony – Frequency modulation.
A battery of 24 Volt supplies during 10 hours a current of 6 ampere. What is the capacity supplied?
A wire aerial for an MF/HF-transmitter must be suspended between isolators:
To prevent contact with earth.
To prevent burns when touching the aerial.
To make the way for aerial currents as long as possible.
According to the rules of GMDSS vessels equipped for all sea areas have to be provided with:
406,0 MHz Cospas-Sarsat EPIRB.
1,6 GHz Inmarsat/DSC EPIRB.
121,5/243,0 MHz VHF EPIRB.
What is understood by carrier frequency?
Frequency of the carrier wave.
The frequency of upper side band (UBS).
The frequency actually used by transmitter and receiver.
Frequency of single side band.
The type-indication of the radio set is mentioned in:
You have an important navigational or meteorological warning to transmit. What call should proceed this message when made on the radio telephone?
SECURITE SECURITE (3 times).
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.
What are the NAVTEX messages categories which cannot be suppressed?
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:
2 187,5 kHz, 8 414,5 kHz and for instance 12 577,0 kHz.
All DSC distress frequencies.
2 182 kHz and channel 70.
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.
With what system is a NAVTEX-message transmitted?
Via a coast-station radio medical advice is asked using NBDP. What command has to be given after ga +?
The authority to order the use of distress signal or distress alerts is:
The first person to discover the distress situation.
The person designated to maintain communication during distress situations.
By the term “Stand by” the operator of a coast-station means that one should:
Give the position of the ship.
Wait on this channel for one hour.
Switch back to the calling channel.
Wait until the coast-station calls again.
The sensitivity of a communication receiver can be adjusted with:
The display of the DSC-controller on board is showing the following lines: RX: 002442000; CH87; D Sellcall Routine. We’re asked to listen on:
Channel Delta of the coast station.
Radio telephony-channel 7 in the 8 MHz band.
In the Maritime Radio Traffic the order of priority is:
Urgency traffic, distress traffic, safety traffic.
Urgency traffic, safety traffic, routine traffic.
Distress traffic, urgency traffic, safety traffic.
Safety traffic, distress traffic, urgency traffic.
When on HF band a DSC distress alert is received, you have to listen to:
8 414,5 kHz (DSC distress frequency in 8 MHz).
The radio telephony distress frequency in the band in which the DSC distress alert was received.
The radio-telex distress frequency in the band in which the DSC distress alert was received.
The MERSAR is:
A fully automated system for mutual assistance and rescue of persons at sea.
A book for communication regulations at sea.
A book of directions for search and rescue at sea.
A survey of vessels favourably located for possible rescue during SAR operations.
You receive a distress alert on HF Radio. What should you do?
Wait three minutes and if no acknowledgement is heard from a coast station you should relay the alert.
Relay the message immediately on 2 182 kHz.
No response is necessary providing the vessel is more than 24 hours away.
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?
The word SATCOM is spelled conform the international phonetic alphabet:
Sierra, Anna, Tango, Cornelies, Oslo, Mike.
Sierra, Able, Tango, Cornelies, Oslo, Man.
Sierra, Able, Tripoli, Charlie, Oscar, Mike.
Sierra, Alfa, Tango, Charlie, Oscar, Mike.