On 2017-09-17 12:41, spam8mybrain wrote: > > I assume TY is for "typhoon". I'm not sure what TC is supposed to stand for. > Example seen from APRS-IS at 2017-Sep-12 04:00:37 UTC: > > W7KKE-3>APRS:W7KKE-3>APRS,TCPIP*,qAC,T3PERTH:;TALIM+12 > *121200z2254.00N/12800.00E at 300/013/TC/075^090 Probably "Tropical Cyclone"