I've thought about this one quite a bit and the surveying isn't the problem, I believe you mean sampling.

I think I want to keep sampling as is, given the player is swimming when they are in water, they shouldn't be able to sample.

Although, I think we should figure out, as a group, a better mechanic for doing sampling over water.

No, surveying is what I meant. If the second feature I suggested is ever going to be implemented - the ability to plant harvesters on water, surface or subsurface, we will need the ability to survey while on water.

But coming back to the first point is that it makes no sense at all that our surveying is disrupted over water. We're almost always - 99.9999%+ - on a vehicle. This is no different than glancing at your gauges or at a map while driving. That we're over water while surveying from a vehicle should be irrelevant, or we shouldn't be able to survey from a vehicle.