Most electronics save those on deck will generally outlast the point at which you can get support from the manufacturer and the time for that seems to be ever shorter. We have a Raytheon R-20x Radar that continues to be very reliable but have a stock of replacement parts from other failed/discarded units, courtesy of an acquaintance in the electronics business. Similarly, we have a Garmin 2006c now 10 years old that is an excellent piece of gear. Unfortunately, Garmin will not service the device if it needs repair and will not offer charts that will work with the device after discontinuing the last, 2008, update. We had a Raynav LORAN that was 20 years old but worked extremely well as a back-up for our GPS devices but of course the Feds killed LORAN to support the welfare state.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."