So heres whats going on, currently I'm building an autopilot system from scratch using an AVR MCU literally for the sole reason of two way telemetry. I have an em406 GPS receiver that I plan to use for waypoint nav. My original intent was to just use the standard NMEA messages it outputs, but I've ran into a few posts that discuss putting it into binary mode, saying that NMEA isn't really very good for an autopilot. I assume binary mode means to change the output format, but how would I go about this?
I've been looking over the datasheets, but I'm still not entirely sure. A little guidance would be lovely.