Sailor RT5022, Руководство по эксплуатации

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Detail
4.7.2 Transmitting Undesignated Distress
Undesignated distress (solely created using the DISTRESS button) does not show any
message prior to the actual transmission. The following message will be sent:
Format Specifier: Distress (112)
Self-Id: <Your MMSI number>
Nature of Distress: Undesignated (107)
Distress Coordinates: Automatically inserted if position is available (e.g. from GPS),
otherwise unknown (9999999999)
Time of Position: Automatically inserted if time of position is available (e.g. from GPS),
otherwise unknown (8888)
Subsequent communication: 100
EOS: 127
4.7.3 Verification of a DSC Call Before Transmission
The final step in each DSC call sequence is the verification window, i which it is possible to
verify the call you are about to transmit. The VHF will by default only display information that
you could influence in the call setup. Example:
Transmit Station Call
MM S I : 00 12345 67
OK/ sen d <M enu / b ac k
What is hidden to the user is that calls are formed
according to the specifications ITU R.493-11.
For the example call (an individual station call request)
the following information is not shown to the user:
• 1
st
tele-command: F3E/G3E Simplex TP
• EOS: Acknowledgement request (RQ = 117)
For all radiotelephony calls transmitted to all ships or to a group of ships:
• EOS: End Of Call (127)
Transmitted acknowledgement calls are not shown in any verification window before
transmission. The acknowledgement of any received individual call requests will be accord-
ing to ITU R.493-11. The manipulation of the received call will be:
• Self-ID in the received call is used as address in the transmitted call
• Address in the received call is used as self-ID in the transmitted call
• EOS: Acknowledgement (BQ = 122)
• 1
st
tele-command might be changed to “Unable to Comply” (104) on operators
request, with the selected reason.
For all received or transmitted calls the full information can be retrieved from the DSC log.
4.7.4 Receiving DSC calls with errors
Distress calls will have an importance that high that even if they are received with errors they
will, as far as possible, be received and displayed on the screen. If a call is received with
errors this will be indicated with a “receive error” (REC ERR) marking next to the heading of
the call. In this case the full integrity of the data is not to be trusted, and the handling
possibility (e.g. relaying the call with direct use of the received data) is limited by the
equipment.
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