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.
An EPIRB has been activated accidentally. Which of the following is correct for cancelling the false distress alert?
Call the nearest coast station and inform it that a false distress alert has been transmitted.
Send a distress priority VHF DSC call and make broadcast to all stations.
Make broadcast to all stations on VHF 16.
Call a LUT and inform it.
Dish aerials are used with:
A distress alert on board may only be transmitted on explicit order of:
The navigating officer on duty.
If requested by a coastal radio station to participate in a rescue operation, what is the most important information you may give?
Your position, name, call sign and speed.
The position of a 406 MHz Cospas-Sarsat EPIRB is:
Passed on by the EPIRB to the satellite.
Measured by the “dopler” shift in the signals.
Determined by satellites by means of directional aerials.
On which frequency a ship must maintain a continuous watch when sailing in area A2?
The prescribed periodic tests of the radio set must be entered in:
Manual maritime radio communication.
The frequency 121,5 MHz is used for:
The traffic list of a coast-station is a list of:
Call-signs of ships for which a radio-telephone call, a telegram or another call is intended.
Name of ship’s scheduled for berthing.
Pertinent navigational and weather information.
Names of ships which, on behalf of safety at sea, are being routed by a traffic control system.
At what minimum height above sea level a SART transponder must be mounted?
The good working of a SART transponder doesn’t depend on the height above sea level.
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.
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.
The meteorological station connected with the CES used.
MET office Washington, this office will take care of further dispatch of the weather reports.
For how long time should a “SARSAT COSPAS” epirb be able to operate on its batteries?
The exact position of a 406 MHz COSPAS SARSAT EPIRB is eventually calculated by:
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.
On area A1 the function “Transmission of ship to shore distress alerts” is mainly based on:
The use of SART transponders.
A DSC-notice should be sent on VHF-channel:
The normal mode of operation for each coast station shall be indicated in:
The ITU List of Radiotermination and Special Services.
The ITU List of Ship Stations.
The ITU List of Call signs and numerical identities of station used by the maritime mobile and maritime mobile-satellite services.
The ITU List of Coast Station.
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.
What does the abbreviation DSC means?
Distress and safety call.
An area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available is called:
You want to send a DSC-call in connection with a shore telephone-call. You must choose:
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?
What are the NAVTEX messages categories which cannot be suppressed?
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.
What is the emergency frequency on MF (Medium Frequency) radio?
Which word will precede an urgency message?
Via Inmarsat-C a message is sent to an Inmarsat-C mailbox with a positive delivery notification (PDN). The ground station will:
Send a PDN, if the message has arrived in the mailbox.
Not send any PDN for this message.
send no PDN’s with messages intended for the mailbox.
Send a PDN, as soon as the message is collected from the mailbox.
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?
F F F (Telegraphy) / RESCUE-RESCUE (Telephony).
X X X (Telegraphy) / PAN-PAN (Telephony).
T T T (Telegraphy) / SECURITE (Telephony).
S O S (Telegraphy) / MAYDAY (Telephony).
MUF stands for:
Highest possible frequency that will be reflected by the ionosphere.
Most effective frequency, to make a connection with an HF-transmitter.
Highest possible frequency that can be made with an HF-transmitter on board.
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.
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 word will precede a safety message?
The following information must be given on the SART:
The name of the operator.
Date of replacement of the batteries.
The date of replacement of the hydrostatic release unit.
Define the class of emission G3E:
Radiotelex and DSC – Frequency shift keying of carrier with error correction.
Radiotelephony – Phase Modulation.
Radiotelephony – Frequency Modulation.
Radiotelex and DSC – Frequency shift keying of sub-carrier with error correction.
Which of the following services is not provided by Inmarsat-C?
After confirmation that there is no other radio-traffic, we call on a VHF working channel of a coast-station. When you don’t get any reply:
You can repeat your call immediately.
You must wait 3 minute minimum before repeating your call.
You must wait 5 minutes before repeating the call.
You must wait 1 minute minimum before repeating your call.
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.
What is the meaning of the abbreviation “RQ” at the end of a DSC sequence?
Acknowledgement broadcast.
The ID of an Inmarsat-M station on board starts with:
According to the rules of GMDSS all vessels have to be equipped with:
A possibility to receive MSI.
At least three mariphones.
Modulation is:
To enhance the side bands in relation to the carrier wave.
Blending LF & HF signals.
The number of oscillations of a wave per seconds is called:
The word NAVTEX is spelled conform the international phonetic alphabet:
November, Apple, Victoria, Tango, Echo, X-mas.
November, Able, Valencia, Tripoli, Echo, Xantippe.
November, Alfa, Victor, Tango, Echo, X-ray.
November, Anna, Victor, Tango, Eduard, X-ray.
On the MF/HF transmitter-receiver there is a sensitivity control. Another name for this is:
On area A3 the function “Transmission and reception of signals for locating” is mainly based on:
The use of SART transponders.
The use of SARSAT COSPAS Epirbs.
In the Inmarsat Maritime Communications Handbook one can find information about:
2 digit code telex services.
Numbers of fax subscribers.
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.
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).
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.
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.
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.
All designated SAR aircraft and civil aircraft carry equipment operating on the international aeronautical distress frequencies (amplitude modulation). The aeronautical distress frequencies are:
123,8 MHz and/or 247,6 MHz.
243,1 MHz and/or 486,2 MHz.
127,8 MHz and/or 71,6 MHz.
121,5 MHz and/or 243,0 MHz.
Silencing by a station, not in charge of the distress-traffic, is done as follows:
“SEELONCE MAYDAY” followed by the call-sign of the ship in distress.
“SILENCE DISTRESS” followed by call sign of the ship in distress.
“SEELONCE MAYDAY” followed by the silencing station’s call-sign.
“SEELONCE DISTRESS” followed by the silencing station’s call-sign.
The word CHANNEL is spelled conform the international phonetic alphabet:
Charlie, Hotel, Able, November, November, Echo, Liverpool.
Cornelies, Hotel, Alfa, November, November, Echo, Lima.
Charlie, Hotel, Alfa, November, November, Echo, Lima.
Cornelies, Hotel, Apple, November, November, Echo, Land.
The wavelength of a radio-signal reflected against the F-layer may be:
What is the two letter signal, to be used by flags, radiotelephony or radiotelegraphy, meaning “Calling All Ships”?
What do you do after receiving a VHF DSC DISTRESS call?
You set watch on VHF channel 16.
You set watch on channel 13.
You send immediately a DSC DISTRESS ACKNOWLEDGEMENT call.
You send immediately a DSC DISTRESS RELAY call.
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:
For how long time should a SART transponder be able to operate in the active mode?
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.
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.
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).
How will you start a cancelling message after you send by mistake a distress call on your VHF DSC equipment?
PAN-PAN – All Stations – This is “SAINT-ROMAIN”.
SECURITE – All Stations – This is “SAINT-ROMAIN”.
All Stations – This is “SAINT-ROMAIN”.
MAYDAY – All Stations – This is “SAINT-ROMAIN”.
A distress alert sent by Inmarsat to an RCC is sent via:
What are the NAVTEX messages categories which cannot be suppressed?
DSC uses for automatic identification the MMSI. The identification 002442000 is assigned to:
A coast-station or coast guard-station.
What do you understand by the initials EPIRB?
This means: Emergency Plotting Indicator Response Beacon.
This means: Emergency Position Indicating Radio Beacon.
This means: Emergency Personal Indicator Rescue Beacon.
This means: Emergency Plotting Indicator Rescue Beacon.
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.
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.
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.
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.
By FleetNET communication is understood:
An urgent message for all ships in a particular area.
A MSI-message destined for ships in specific geographical area.
A HF-NBDP-message destined for ships in a certain geographical area.
An EGC-message destined for ships with the same group call number.
What is the most important factor influencing the HF range?
The power of the transmitter.
Automatic amplifier regulation is used for the following reasons:
With strong incoming signals distortion is reduced.
With weak incoming signals distortion is reduced.
With bad weather the signal is amplified.
With absence of incoming signals noise is reduced.
To get proper conversation discipline in maritime radio traffic:
Every available VHF-channel should always be used.
Only after permission by captain, to send and/or receive on a VHF-channel pointed out the master.
Communication should be done only as per company’s prescribed schedule.
Only necessary radio conversations are made in a concise and businesslike way.
Which equipment will detect a signal from a SART transponder?
What does the abbreviation VHF means?
Variable Hertz Frequency.
Which class of emission is used for VHF radio telephony transmissions?