AirCare 2 and King George

AirCare 2, a medical helicopter based at Shannon Airport in Fredericksburg, was responding to a motor vehicle accident this afternoon in King George. The helo tried contacting the county on 155.7600 [ d412], but received no response. The county currently uses 155.7600 [141.3]. (The tones were switched from DCS to CTCSS several years ago.) I believe the helo was able to land at the scene without any problem, but this incident highlights the importance of keeping responders informed of radio system changes.