https://gpsd.gitlab.io/gpsd/libgps.html typo en/dis able
https://gpsd.gitlab.io/gpsd/libgps.html appears to be a man page. Under gps_stream, it describes the possible flags, starting with
WATCH_DISABLE Disable the reporting modes specified by the other WATCH_ flags.
WATCH_ENABLE Disable the reporting modes specified by the other WATCH_ flags. This is the default.