I had an interesting silhouette issue appear yesterday. I had two NASA planes merge in my area and fly north for about 100 miles then backtrack and separate and go on their way. Anyway, the first one was a U2 that painted as two jet engine commercial symbol such as a 737 or 767. The other was a P-3 which painted as a C130. I thought my Basestation.sqb files were wrong and so I verified the ICAO type code was correct and they were. I thought maybe the ICAO codes were updated so I checked the Aircraft type designators on line and they are still current. I put marks in the Basestation.sqb file while these planes were still in range and the display responded with the changes I made. A few times a week I do some verification in the files and sometimes make changes of data of aircraft flying by so if Virtual Radar was not responding I would know. Does anyone have any ideas? Thanks.