The 3600a already has a 256-colors screen.

You're correct. My mistake. I misread Garmin's "16 bit color" as 16 colors.

Okay, so all they have to add is Bluetooth (and maybe a slightly faster
processor) and I'll bite.

Someone told me Lowrance is going to add terrain to their 2000C. But if
I can use a $1000 product outside the cockpit, that's more utility for
the money.

Mike Palmer