Thanks much!!

Apparently it is important for the system to report over 100k...

The data is binary, not NMEA. The 3 bytes are the altitude, and it is in tenths of a meter. (binary value in tenths of meters)

My challenge is that I have THREE bytes.. each with values that together equal the value I need.

Value is sent in these 3 bytes as LSB first, then NMSB, then MSB.

Does that help?

TG