Fred Choate wrote:

I kind of felt that maybe
the pilot of the float plane should have said a bit more to clarify what he
was doing.


I am familiar with the Seattle area, though I've never flown any kind of
plane there. Having at one time been a seaplane pilot, I find myself
looking up when one goes over, and that is a frequent occurence in
Seattle and environs. So I think any pilot there would be alert to
seaplane activity and be paying attention to the water as well as to
airstrips on sectionals (and the usual scan, etc.).