7-A-098: MF-HF: DSC Controller Alert/Call Response
7-98J1:
The Distress Alarm sounds and the screen readout no longer contains the particulars of the Distress:
Examine the Received Data Directory or the printer to recover the information.
The particulars are rarely routed to the printer so it is of no use to examine the printer.
Examine the Transmitted Data Directory or the printer to recover the information.
Call the Distress vessel on the DSC frequency and request a retransmission.
7-98J2:
A DSC Distress call is received by your vessel and your transceiver frequency display reads:
Transmit = 4207.5 kHz and Receive = 4207.5 kHz with J3E emission-- what information can you infer from this?
The DSC call requested voice on 4207.5 kHz simplex but the requested alternate frequency is improper.
The DSC controller decoded the requested voice frequency 4207.5 kHz simplex and your DSC controller has automatically set-up your transceiver and therefore the requested alternate frequency is correct.
The DSC call name in on 4MHz DSC. You should set-up your transmitter and respond on the appropriate voice follow-on frequency of 4177.5 kHz.
The DSC call came in on 4 MHz DSC. You should set-up your transmitter and respond on the appropriate voice follow-on frequencyof 4207.5 kHz.
7-98J3:
What are potential dangers of automatic transceiver switching in response to a DSC call?
The transceiver may be switched out of the marine bands or the frequency may not match the requested priority or emission.
Incorrectly formatted DSC calls from other vessels result in a warning in the DSC alarm screen but the vessel still might be switched to an illegal or improper outcome.
The automatic transceiver switching software always detects improper priorities, emissions & frequencies to ensure there is no danger.
The automatic transceiver switching feature always interrupting safe navigation of your own vessel and placing the unit on the GMDSS Distress, Urgency o Safety follow-on frequencies.
7-98J4:
Which of these would not be a bad outcome of an Urgency DSC call to all vessels specifying an alternate TELEX frequency & emission that cause your transceiver to automatically switch?
The DSC controller decoded the contents of the DSC call and the requested frequency is on the DUS table/placard in the J2B emission.
The DSC controller decoded the contents of the DSC call and the requested frequency is not on the DUS table/placard but is in the marine band frequencies in the J2B emission.
The DSC controller decoded the contents of the DSC call and the requested frequency is on the DUSC table/placard in the J3E emission.
The DSC controller decoded the contents of the DSC call and the requested frequency is not on the DUS table/placard, is not in the marine band or the other vessel requested a J3E emission.
7-98J5:
An incoming Distress priority 16 MHz DSC call requesting J3E emission might automatically switch to what frequency?
16420.0 kHz
16420.0 MHz
16696.5 kHz
16804.5 kHz
7-98J6:
An incoming DSC Distress alert on 8414.5 kHz will have what result?
All of these answers would typically occur.
The DSC controller will emit both an audible and visual alarm.
The particulars of the alert may be printed out.
The Distress information contained in the alert will be sent to the data directory.
|
Color key:
|
|
● = Unseen
|
|
● = Weak
|
|
● = Review
|
|
● = Learned
|
|
● = Incorrect answer
|
