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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link=blue vlink=purple style='margin-left:7.5pt;margin-top:7.5pt;margin-right:7.5pt;margin-bottom:7.5pt'><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi Ditz,<o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>“I guess you wouldn't remember me” … </span></i><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I certainly do – as I recall you had a reasonable result on the pokies at the Sky City Casino during the after course function!<br>Good to hear from you again, and many thanks for the insight into the mysteries of DSC. I suspected that all that traffic could not possibly be all legit!!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>All the best for the New Year<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Andy</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='margin:0cm;margin-bottom:.0001pt'><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> thelist-bounces@radiowiki.org.nz [mailto:thelist-bounces@radiowiki.org.nz] <b>On Behalf Of </b>dpowell<br><b>Sent:</b> Sunday, 2 January 2011 2:41 p.m.<br><b>To:</b> thelist<br><b>Subject:</b> [TheList] HF DSC<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Hi Andy</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;color:black'>I guess you wouldn't remember me for the short time I spent with North Comms after my initial training period with you and the other training staff.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Anyway, I subsequently left and rejoined the Maritime Safety Organization after being made redundant when it changed hands from Telecom to BCL (which was why I joined your organization) and BCL eventually becoming Kordia. So it was a shift from Auckland to Wellington where I still reside and doubt very much that I'll be heading back Auckland way any time soon.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;color:black'>I digress......... in answer to your question below (sorry it's taken so long to respond, it's was one of those years) I hope this enlightens you and others who may have been interested:</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>1. The first message is an incorrectly formatted station call from MMSI 412081780 (Zhuohai/BUWO) to Shanghai MRCC. Zhuohai should have indicated the R/T frequency they wished the subsequent communications to be on. It was also sent on the wrong frequency as the Category for the message was only routine, at a minimum it should have been Safety.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>2. The second message is an Urgency Geographic area call transmitted by RCC Australia/VIC and which preceded their Pan Pan call on 8291 kHz, as you mentioned. This was the correct use of DSC. And one would hope so since the communications unit is run by Kordia.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>3. You are correct, there is a lot of DSC test traffic. Probably more than there should be. We see on average 6000 - 7000 messages a day on the DSC frequencies 4/6/8/12 & 16 MHz. Most are either incorrectly formatted or on the wrong DSC frequencies. Correct procedure is for ship stations to test their DSC units once a week and only on one frequency (if successful with the first test). This is plainly not happening. One of our staff wrote up a report for an ITU survey on this issue about 5 years ago. The only traffic we should see these frequencies are:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'>a)</span><span style='font-size:7.0pt;color:black'> </span><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'>Distress messages - Subsequent comms on R/T distress or NBDP distress frequencies</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'>b)</span><span style='font-size:7.0pt;color:black'> </span><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'>Urgency messages- Subsequent comms on R/T or NBDP using frequencies as directed by the originating station in the RX/TX frequency fields. At the MOC we always use the R/T distress frequencies for our message traffic.</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'>c)</span><span style='font-size:7.0pt;font-family:"Verdana","sans-serif";color:black'> </span><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'>Safety (includes Test & All Station messages). - Subsequent comms as directed by the originating station.<br><br></span><span style='font-size:9.0pt;color:black'>NB: We have noticed that both Korea and Vietnam Coast Radio Stations precede their scheduled Maritime Safety Information broadcasts with a DSC Station call. GMDSS regulations states that this is not required.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>4. Telecommand 1. Dependant upon the type of message this field can serve different purposes. On some messages it will indicate the subsequent mode of communications. On other times it will serve as a formatting instruction for the message (usually distress acknowledgments and distress relays). It can also be used for requesting position reports and polling commands.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>5. Telecommand 2 is designed for use in commercial services, so will not be used for messages on the Distress, Urgency and Safety frequencies. (I can hear the big "yeah right").</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>Hope you Xmas and New Year went well.</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>Best wishes to you n yours for the New Year</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>Cheers</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:black'>Ditz</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:black'>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Is there anyone on here with some knowledge of the procedures used on HF<o:p></o:p></span></p></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Digital Selective Calling (DSC)?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>I've just started decoding this traffic and was wondering about the large<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>numbers of apparent test messages to and from coast stations.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Like this:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'><Selective call to a particular individual station><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Called MMSI station address: ��41221�� [Coast station: Shanghai MRCC<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Shanghai/MRCC China] (China)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Category: Routine<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>MMSI self-identifier: 412�8178� [Ship] (China)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Telecommand 1: J3E telephony<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Telecommand 2: No information<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Neither RX/TX frequencies nor position supplied<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Check Sum: OK<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Date and time of decoding: 31/12/2�1� �8:12:44<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>There are occasional obvious distress or urgency calls such as this copied<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>on 8414.5:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'><Selective call to a group of ships in a particular geographical area><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Zone: �ذN Side=�6� 143�ESide=�6�<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Category: Urgency<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>MMSI self-identifier: ��5�3���1 [Coast station: Charleville/Wiluna RCC<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Australia] (Australia)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Telecommand 1: J3E telephony<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Telecommand 2: No information<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>RX frequency: 8291.� KHz TX frequency: 8291.� KHz<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Check Sum: OK<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Date and time of decoding: 31/12/2�1� �7:51:36<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>This preceded a PAN PAN voice call by RCC Australia/VIC on 8291kHz about an<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>overdue dugout canoe.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Does anyone know the purpose of all the other calls with no Telecommand or<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>RX/TX frequencies specified? Random button presses or do they have a<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>purpose?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Happy New Year<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;color:black'>Andy<o:p></o:p></span></p></div></div></div></div></body></html>