The fam bought Belle-Ve a Garmin 178C Sounder in 2004, which has been discontinued for a number of years. Whether Garmin would ever repair it, probably not. But as a testament to Garmin quality, I use this unit all the time, cruising thousands of miles all over PNW waters and it always works and very accurate. I purchased two chart cards, one that covers all of Puget Sound north to the top end of Georgia Strait, inside waters. The other covers from Everett, WA north to the Alaska border both inside and outside Vancouver Island waters.
Maybe someday it will stop working, but until it does it will remain a devoted device of Belle-Vie.