Possible Clues:

• Harbor transport
• Extra wait at sea perhaps for such transport..
• Public transportation stopping at docks (Harry Chapin)
• Providing a service, of course, for travellers in Venice, foreign waiter welcomes Levi loudly
• Extra wait, sadly, for service in Venice?
• Motorboat for commuters
• Passenger-transporting motorboat
• Pier picker-upper
• Bay transport