The mystery of the 12 second latency in the dynamic response of the EM406 GPS is solved. Recently, I stirred up a debate about whether or not the EM406 has a 12 second latency or not. A few of us were seeing a 12 second latency. The majority of EM406 users were not seeing it. It turns out that the dynamic performance of the EM406 depends on which interface you use, NMEA or binary. If you use bi…