"if there's been a failure and you send it back you don't really want the same board back again. It's been reworked and that's never good. Customers should get replacement hardware for all failed PCB's."

Much of the new instrumentation isn't repairable. Bonded displays, single boards, systems on a chip, permanently sealed housings, etc. "Repair" consists of sending them the broken one and they send you back a brand new one. This can even be arranged so that they pass each other in the mail. I don't even think there are any scavenge-able parts in many of these things that the manufactures can recover for reuse.

At least our Tritons, autopilot controller, wind transducer and GPS are this way (as are the speed and depth transducers, like always). It looks like Raymarine, Garmin, and the like are also producing instruments in this manner. Our old-fashioned chart plotter can still be opened up and repaired, but I don't know about the newer touchscreen ones.

Mark