Installation manual ...:
https://humminbird.johnsonoutdoors.com/sites/johnsonoutdoors-store/files/assets/misc/HU/H/HUM_productmanual_IG_OPS_GPS_531478E/HUM_productmanual_IG_OPS_GPS_531478E.pdf?_ga=2.142 300977.2073382936.1583369808-556060066.1583120920
Operation manual ...:
https://humminbird.johnsonoutdoors.c...066.1583120920
Rickie