A is not a fairway because - it does not proceed along a shoreline or through a harbor
A can be a channel, even though not marked for navigation
(I would not call Dock
Letters, which are marked navigation marks) . It may not be a waterway because it does not appear to have been "improved by dredging"
B is not a fairway - it does not proceed along a shoreline or through a harbor.
B is a channel - It is marked for navigation. B is also a waterway - it is a channel improved by dredging
C is none of the above. i.e. open unmarked water
As I said in the other thread -
I would refer to A as a marina side channel and B as a marina entrance channel or main channel.
I believe OldFrog is looking for a definition for "A"
BTW - I am the dissenter that voted channel. Flame away -