It kind of depends on what's under it.
Yes, the boat can easily run in 12" of water, but if it's very soft/silty.... then the suction will draw that up into the pump, and put the sand/dirt/mud into your cooling system.
I've run my old sportster in a gravel bottom river that was only a few inches deep, without an issue. I was actually up to a section of the river where I could see the ripples in the water, from the gravel on the bottom... and there were guys standing in the water fly-fishing.