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Ever since I moved to Ocean County, I've been hearing data on two frequencies. These frequencies are 508.062 MHz and 508.137 MHz. Data is first heard on 508.062 MHz, stops, than starts back up again on 508.137 MHz. This repeats for about 1-3 minutes. Today, at this very moment, the data is lasting a long time, usually it only lasts about 1-3 minutes but it's lasting for about 6 minutes. This doesn't seem like encrypted communications. These are bursts of data, not continuous data streams. Does anyone know what this could be?

EDIT: It's 7:47 and as of now, it's still going on. Here is an MP3 audio sample: http://www.freewebs.com/filingeri/misc/octrsdata1.mp3.