# ============================================================
#  RadioRations — GPS refclock for chrony (USB GPS via gpsd SHM)
#  Appended / merged by the installer
# ============================================================

# USB GPS NMEA via gpsd shared memory (no PPS on most cheap USB mice)
# Tune "offset" after several hours: chronyc sourcestats
refclock SHM 0 refid GPS precision 1e-1 offset 0.0 delay 0.2 prefer

# Allow stepping the clock early after boot
makestep 1.0 3

# Serve time to LAN (and optionally Tailscale CGNAT range)
allow 192.168.0.0/16
allow 10.0.0.0/8
allow 172.16.0.0/12
allow 100.64.0.0/10
