Finally back on floats with the new avionics, 2 GI-275s, GNC355 and CGR30P. Adds a lot of functionality but have found one hitch, well besides the non functioning #3EGT channel.
With updated databases, the GI-275s yell TERRAIN Pull Up, constantly while landing and taking off. Totally understandable for a landplane since one would not be operating a landplane in such conditions. But how do I set them for float ops?
I have a call in to Garmin but thought it might interest others getting or considering new “modern” avionics.

Do you have an external TAWS inhibit switch? It’s key. No more going through menus to inhibit the warnings. I use it 5x/day at work for glacier landings. Never use the terrain system on floats but I imagine same problem.

It doesn’t need to be the garmin brand annunciation panel like this, a simple momentary switch can be wired for the function. Same for traffic warning.

Im told the gi275 is a mini G3X. So on the G3X you have to be on the terrain page. hit menu. and there will be options to inhibit terrain. Ken