Updated on 18 January 2013 | A fairway is an unobstructed, deep-water thoroughfare in a harbor, guaranteeing smooth passage to large vessels — a highway in the sea. Though there’s no evidence of the fairway to greet the eye, accumulated experience watching the ferries arrive and depart will acquaint you with its presence. There’s a reason their movement through the harbor seems so predictable: they’re following the entrance channel fairway. This main fairway forms a Y as it nears shore, branching into the Coast Guard fairway and the Provincetown fairway, to MacMillan Pier. There is also a personal watercraft fairway. These and other features are mapped in the Provincetown Harbor Guide, a very useful publication of the Provincetown Tourist Fund.