diff --git a/etc/chrony/conf.d/gps.conf b/etc/chrony/conf.d/gps.conf
index 981095ae..b7b71f0b 100644
--- a/etc/chrony/conf.d/gps.conf
+++ b/etc/chrony/conf.d/gps.conf
@@ -1,3 +1,10 @@
+# This configuration comes from
+# https://wiki.alpinelinux.org/wiki/Chrony_and_GPSD with socket address
+# corrected since I had difficulties understanding the manual in a hurry.
+# My hardware: ALTHA G-Mouse GPS \n Model GGM308
+#  Untested suspicion due to rain: it will not announce itself to computer
+#  or lsusb until it has GPS fix?
+
 refclock SHM 0 poll 3 refid GPS1
 # unlikely to work with usb
 refclock SHM 1 refid GPS2