Résultats de test
The hydrostatic release of an EPIRB should be changed:
What is the most important factor influencing the HF range?:
A SART must be visible on the ship’s radar from a distance of at least:
To get proper conversation discipline in maritime radio traffic:
Is it necessary to state the accounting code of the vessel in fully automated radio telex-traffic with a coast-station?:
The frequency 121,5 MHz is used for:
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:
Give the command after ga + for the transmission of a “store and forward”-message with radio-telex:
Under GMDSS rules the trading area A1 can be considered to be:
For how long time should a “SARSAT COSPAS” epirb be able to operate on its batteries?:
How are the NAVTEX areas identified?:
Which of the following frequency bands would most likely provide reliable communication between two stations that are 15 miles apart?:
Which word will precede a safety message?:
Long distance communication in the HF-bands depends on:
Reflection of radio waves in the ionosphere depends on:
The type of Inmarsat station A, B, C, M is recognized by:
At the end of a radio telex-connection, when a “store and forward” message has been transmitted, the coast-station at least gives a:
The “clarifier” has only effect during:
By frequency is meant:
What is the emergency frequency on MF (Medium Frequency) radio?:
The normal mode of operation for each coast station shall be indicated in:
Which of the following frequencies is used by the NAVTEX system?:
The Inmarsat-satellites are located:
Via Inmarsat-C a message is sent to an Inmarsat-C mailbox with a positive delivery notification (PDN). The ground station will:
Inmarsat is short for:
In radio-telex distress traffic preference is given to FEC because:
With an EPIRB:
On area A1 the function “Transmission of ship to shore distress alerts” is mainly based on:
What is SITREP an abbreviation for:
According to the rules of GMDSS vessels one must be able to receive MSI with the aid of:
Sea area A4 is in maritime radio traffic sea area:
The DSC-controller display the following: DOO: 244562000 CH16; S distress sinking. After receiving this DSC message the following is done immediately:
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:
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:
A vessel is equipped for all sea areas. In the middle of the Indian Ocean the EGC-receiver appears out of order. Is it still possible to receive MSI-messages?:
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:
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?:
Which equipment will detect a signal from a SART transponder?:
A distress-call, onboard via RCC, may only be given Receipt if:
MUF stands for:
Onboard the following message is received on the DSC controller: DOO: 245329000 CH16; S distress ack 244123000. What station sent the distress acknowledgement?:
The position of a 406 MHz Cospas-Sarsat EPIRB is:
The ID of an Inmarsat-M station on board starts with:
You receive a distress alert on HF Radio. What should you do?:
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?:
The different layers in the ionosphere, important for radio propagation, are effected by:
You have an important navigational or meteorological warning to transmit. What call should proceed this message when made on the radio telephone?:
The word NAVTEX is spelled conform the international phonetic alphabet:
According to the rules of GMDSS all vessels have to be equipped with:
What is the purpose of the radiotelephony two tone alarm?:
Dish aerials are used with:
Which of the following is a Accounting Authority Identification Code?:
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:
The following information must be given on the SART:
How will you start a cancelling message after you send by mistake a distress call on your VHF DSC equipment?:
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.:
Automatic amplifier regulation is used for the following reasons:
What information has to be given to set up a radio telex-connection with a coast-station:
The Satellite orbit in the Cospas-Sarsat system is:
The identification of a coast station is composed as follows:
The batteries must be placed in a well ventilated place, so that:
On area A2 the function “Transmission of ship to shore distress alerts” is mainly based on:
The number of oscillations of a wave per seconds is called:
With maintenance of batteries it is of primary importance that:
If a coast-station doesn’t answer a call on VHF working channel or doesn’t send a reply signal:
At what minimum height above sea level a SART transponder must be mounted?:
DSC uses for automatic identification the MMSI. The identification 002442000 is assigned to:
The sensitivity of a communication receiver can be adjusted with:
VHF channel 6 is:
By the degree of selectivity of a receiver is meant:
According to the rules of GMDSS all vessels have to be equipped with:
What do you do after receiving a VHF DSC DISTRESS call?:
What is the acronym FR 01?:
The type-indication of the radio set is mentioned in:
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:
Distress MF communications should normally be operated:
Which of the following services is not provided by Inmarsat-C?:
One can check the functioning of the SART by:
The effect of reflection of the radio waves in the ionosphere on the range depends on:
Dish aerials are used with: