GMDSS. FCC Test 54 – Online Maritime Tests

Which of the following keystrokes or characters is sent as part of ARQ communications to signal the end of communications with a land based telex terminal?

Four 'K's, i.e. 'KKKK'.
'BRK+'.
Four 'N's, i.e. 'NNNN'.
Five periods ('. . . . .').

Which of the following keystrokes or characters is sent as part of ARQ communications to end the radio link?

Four 'N's, i.e. 'NNNN'.
Four 'K's, i.e. 'KKKK'.
Five periods ('. . . . .').
'BRK+'.

For ARQ communications with a Public Correspondence Coast Station, which sequence of events best describes reaching the point in time where the text of telex communications should be sent.

Transceiver setup, Automatic Exchange of Answerbacks, OPR+, operator entry of the appropriate automatic telex code.
Transceiver setup, SelCall selection, Initiate Call, Exchange of Station Answerbacks, GA+?, enter DIRTLX xy+, MOM, MSG+? and exchange of terminal answerbacks.
Transceiver setup, Automatic Exchange of Answerbacks, GA+, operator entry of the appropriate automatic telex code.
Transceiver setup, SelCall selection, Initiate Call, Automatic Exchange of Answerbacks, OPR+, operator entry of the appropriate automatic telex code.

Assuming sending a direct telex message to a shore-based office, which sequence of events best describes a complete ARQ telex exchange with a coast station?

Initiate call, observe phasing, Automatic Exchange of Answerbacks, send message, send KKKK to terminate the telex link, receive MRN & Time and charges.
Initiate call, observe phasing, Automatic Exchange of Answerbacks, send DIRTLX command with zero then telex country code, telex number, send message, send KKKK to terminate the telex link, receive MRN & Time and charges.
Initiate call, observe Automatic Exchange of Answerbacks, send message, send KKKK to terminate radio link, receive MRN & Time and charges.
Initiate call, observe phasing, Automatic Exchange of Answerbacks, send message, send KKKK to terminate radio link, receive MRN & Time and charges.

During ARQ communications, A Coast station will likely break the phased radio connection:

If the operator enters 'KKKK.'
If the error percentage of repeat requests becomes too high.
If either a
If the automatic exchange of answerbacks is interrupted by keyboard entries.

During ARQ communications, A Coast station will likely break the phased radio connection:

If the automatic exchange of answerbacks is interrupted by keyboard entries.
If the operator enters 'BRK+.'
If any of the above actions takes place.
If the error percentage of repeat requests becomes too high.

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