In what case AIS Message Type 3 should be transmitted?


#1

[B]Hi, I am a new comer. Having [/B][B]looked deeper into the cause of the sinking of the Sewol,[/B] [B]I come to join here to get your helps.[/B]

[B]My recent interest is focused on 27 types of AIS messages, esepecially on the AIS message type 3, which was transmitted on the last sharp turning moment of the ro-ro vessel.[/B]

[B]The usage of AIS Message Type 3, which I found through surfing the Internet, is as follows :[/B]

B “AIS Message 3 is a special or interrogation position report that is commanded using AIS message 15”[/B]

[B]Utility of Various AIS Messages for Maritime Awareness[/B][B], by[/B] [B]James K.E. Tunaley[/B]
[B]http://www.london-research-and-development.com/Utility-of-Various-AIS-Messages-for-Maritime-Awareness.pdf[/B]

B “Message 3 transmission is ITDMA based and is used [/B]
[B]when a ship is announcing a need for extra slots due to increased reporting rate, usually related to a change in speed or cruising direction.” [/B]

[B]AIS message extraction from overlapped AIS signals for SAT-AIS applications[/B][B],[/B]
[B]by [/B][B]Andis Dembovskis [/B]
[B]http://elib.suub.uni-bremen.de/edocs/00104599-1.pdf [/B]

[B]Here, my puzzle is “Is the above (1) and (2) just the same case, or two separate cases?”[/B]

[B]I need a clear answer from you,[/B] [B]professional[/B] [B]AIS users.

[/B][B]I hope you show me the way out of the fly-bottle.
[/B]

[B]The below raw data of AIS Message Type 3 was sent by the passenger ship Sewol on April 16 2014. You can see the decoded information by Decoding program[/B]

[B]Do they belong to the [/B][B]interrogat[/B][B]ed[/B] [B]position report that is commanded using AIS message 15[/B][B]?

[/B]

[B]$IEC01,VTS1004,4403318,P,0,20140416084837|!AIVDM,1,1,B,16SWOT002ga0VwpCS9L5B4Fv2D9:,00B^65[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084913|!AIVDM,1,1,B,36SWOT0Ojc90Wj@CS3i5eDdJ20sQ,0
6D^0E[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084919|!AIVDM,1,1,B,36SWOT0Oja90WojCS2kmm4nV20wh,048^5F[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084919|!AIVDM,1,1,A,36SWOT0Oja90WojCS2kmm4nV21Ri,0
6E^06[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416084919|!AIVDM,1,1,B,36SWOT0Oja90WojCS2kmm4nV20wh,048^57[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416084919|!AIVDM,1,1,A,36SWOT0Oja90WojCS2kmm4nV21Ri,0
6E^0E[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084925|!AIVDM,1,1,B,36SWOT0OjW90WtdCS1mEv52j2271,027^36[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084926|!AIVDM,1,1,B,36SWOT0OjW90WuJCS1c60E4l2000,0
47^53[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084930|!AIVDM,1,1,A,36SWOT0OjU90WwtCS10n=m<t20q0,005^10[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084931|!AIVDM,1,1,A,36SWOT0OjU90WwtCS10n=m>j22h1,0
03^11[/B]
[B]$IEC03,VTS1004,4403308,P,0,20140416084936|!AIVDM,1,1,A,36SWOT0OjP901vCRww6UU82000,02A^46[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416084937|!AIVDM,1,1,B,36SWOT0OjN9026CRwlFdma:23@A,0*17^06[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416084956|!AIVDM,1,1,,A,36SWOT0Oj?a0WwCRumWaW;P2000,0
06^10[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416084956|!AIVDM,1,1,A,36SWOT0Oj?a0WwCRumWaW;P2000,0*06^18[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085016|!AIVDM,1,1,,A,36SWOT0Oica0We<CRspaQGnB2000,0*5D^38[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085019|!AIVDM,1,1,,A,36SWOT0Oica0WcDCRsi9bWtJ21OQ,0*4C^20[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085020|!AIVDM,1,1,,B,36SWOT0Oica0WcDCRsi9bWtJ210P,0*31^22[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085025|!AIVDM,1,1,,B,36SWOT0Oica0WWTCRsaaiH4T227Q,0*0A^67[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085025|!AIVDM,1,1,,B,36SWOT0Oica0WWTCRsaaiH4T227Q,0*0A^6F[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085026|!AIVDM,1,1,,B,36SWOT0Oiba0WTLCRsTasp4T2000,0*63^71[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085031|!AIVDM,1,1,,A,36SWOT0Oiaa0WNPCRsOb<p<f22lQ,0*37^22[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085037|!AIVDM,1,1,,B,36SWOT0Oia0WHTCRsM:IH>r23Ai,022^35[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085037|!AIVDM,1,1,B,36SWOT0Oia0WHTCRsM:IH>r23Ai,0*22^3D[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085046|!AIVDM,1,1,,B,36SWOT0Oia0W>pCRsObdpC<2000,0
27^3B[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085050|!AIVDM,1,1,A,36SWOT0Oiaa0W<dCRsObg8E@20v@,034^2D[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085050|!AIVDM,1,1,A,36SWOT0Oiaa0W<dCRsObg8E@20v@,0
34^25[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085056|!AIVDM,1,1,A,36SWOT0Oiba0W30CRsd;2pMR2000,02F^4B[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085057|!AIVDM,1,1,A,36SWOT0Oiba0W30CRsd;2pMR2000,0
2F^42[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085100|!AIVDM,1,1,B,36SWOT0Oiba0W18CRsi;6QV20uh,0*3A^52[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085100|!AIVDM,1,1,,B,36SWOT0Oiba0W18CRsi;6QV20uh,03A^5A[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085109|!AIVDM,1,1,A,36SWOT0PAWa0VmTCRt<cRGj42110,0
07^1B[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085109|!AIVDM,1,1,A,36SWOT0PAWa0VmTCRt<cRGj42110,007^13[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085113|!AIVDM,1,1,B,36SWOT0PAVa0VlCRtAcUWh620vA,0*6D^0F[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085116|!AIVDM,1,1,,A,36SWOT0PATa0VilCRtKcgof<2000,0*56^48[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085116|!AIVDM,1,1,,A,36SWOT0PATa0VilCRtKcgof<2000,0*56^40[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085125|!AIVDM,1,1,,B,36SWOT0PALa0VbDCRtvd8GdN22:Q,0*3A^55[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085125|!AIVDM,1,1,,B,36SWOT0PALa0VbDCRtvd8GdN22:Q,0*3A^5D[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085130|!AIVDM,1,1,,A,36SWOT0PAGa0VUtCRuJ<FGbb20uh,0*70^6E[/B] [B]$IEC03,VTS1004,4403318,P,0,20140416085130|!AIVDM,1,1,,A,36SWOT0PAGa0VUtCRuJ<FGbb20uh,0*70^66[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085131|!AIVDM,1,1,,A,36SWOT0PAGa0VUtCRuJ<FGbb22hA,0*46^5C[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085136|!AIVDM,1,1,,A,36SWOT0PABa0VRlCRuk<S7bn2000,0*3F^55[/B] [B]$IEC03,VTS1004,4403310,P,0,20140416085137|!AIVDM,1,1,,B,36SWOT0PAAa0VQpCRuu<obr23AQ,0
5A^30[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085137|!AIVDM,1,1,B,36SWOT0PAAa0VQpCRuu<`obr23AQ,05A^38[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085144|!AIVDM,1,1,A,36SWOT001<a0VNhCRvK<moc623mA,0
7A^16[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085146|!AIVDM,1,1,B,36SWOT001<a0VNhCRvK<moc>2000,05E^36[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085146|!AIVDM,1,1,B,36SWOT001<a0VNhCRvK<moc>2000,0
5E^3E[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085149|!AIVDM,1,1,A,36SWOT0019a0VMPCRvb<rocB2120,02A^46[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085156|!AIVDM,1,1,A,36SWOT0015a0VKDCRw8=5WcJ2000,0
1A^7B[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085156|!AIVDM,1,1,A,36SWOT0015a0VKDCRw8=5WcJ2000,01A^73[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085200|!AIVDM,1,1,B,36SWOT0011a0VIhCRwNe=ocV212h,0
6A^04[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085206|!AIVDM,1,1,B,36SWOT000va0VHlCRwh=C7cl2000,010^06[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085207|!AIVDM,1,1,B,36SWOT000va0VHlCRwh=C7cl2000,0
10^0F[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085210|!AIVDM,1,1,A,36SWOT000sa0VGTCS0;eI7b220v0,07F^1E[/B]
[B]$IEC03,VTS1004,4403310,P,0,20140416085210|!AIVDM,1,1,A,36SWOT000sa0VGTCS0;eI7b220v0,0
7F^16[/B]
[B]$IEC01,VTS1004,4403318,P,0,20140416085213|!AIVDM,1,1,B,16SWOT000ra0VG@CS0@eKGb626s@,015^00[/B]
[B]$IEC01,VTS1004,4403310,P,0,20140416085213|!AIVDM,1,1,B,16SWOT000ra0VG@CS0@eKGb626s@,0
15^08[/B]
[B]$IEC03,VTS1004,4403318,P,0,20140416085216|!AIVDM,1,1,A,36SWOT000qa0VFtCS0M=OWb<2000,0*5C^3C[/B]

[B]https://i.gyazo.com/b2ee5df8ccf5008b27f06b345f2c5b94.png[/B]
[B]https://i.gyazo.com/e977377a1fa2655228c72ca14b096eb0.png[/B]
[B]https://i.gyazo.com/ede5f0df24e741044768baac8523494a.png[/B]
[B]https://i.gyazo.com/6b85a220b5f27b4df914c200fc9fa1bd.png[/B]
[B]https://i.gyazo.com/c4ddd3f7a186dd16b581d890fe9e1659.png[/B]
[B]https://i.gyazo.com/ea96b1230d72caacc8c1d2ce43516fb3.png[/B]
[B]https://i.gyazo.com/2aafe2ab3c28db2a91a73201e7118bb8.png[/B]


#2

[B]T/I Transmits by own station, and responds if interrogated by msg 15
[/B]
[B]<img src=https://i.gyazo.com/193975ba59004520ed7a9275b24d7052.png width=656 height=760>[/B]
[B]IALA Guideline No. 1059 On The Comparison of AIS Stations Edition 1 June 2008 [/B]
[B]http://www.e-navigation.nl/sites/default/files/1059%20Comparison%20of%20Different%20Types%20of%20AIS%20Stations.pdf[/B]
[B]IALA Guideline 1082 An overview of AIS[/B] [B] June 2016[/B]
[B]http://www.navcen.uscg.gov/pdf/IALA_Guideline_1082_An_Overview_of_AIS.pdf[/B]