Surface Indicator...............Select Landing Surface.
I don't think it's so much a problem with pilots making a wrong landing gear position selection, but rather
forgetting to make the required landing gear position - they land it in the configuration they were flying enroute, without checking. There are an unfortunate number of gear up in runway amphibian landings too, though they tend to be less dramatic, and newsworthy. As with so many things about aviation, the best safety system is an alert pilot making the required decisions. I will not check out an amphib pilot who will not visually check gear position, and speak the position and landing surface out loud.