RoyalTek RBT-2300 - Manual (Page 55)

received data to an internal memory. Being switched on, datalog GPS
receivers start writing the position, date, and time into a log file. This
logged data can be read and saved on e.g. a PC. So the data is also
available for other applications like the locr PGS Photo software.
Note: Different datalog GPS receivers create log files in different
formats. How these files can be used with locr GPS Photo is
explained in the FAQs: “Which GPS datalogger can I use for
automatic geotagging anyway?”