Port Phillip by boat from Geelong, Portarlington and St Kilda, the hourly car ferry across the heads, and a small punt over the lower Yarra.
Victoria's pages here cover a bay and a river. The boats Transport Victoria oversees share little beyond that oversight and the fact that none of them takes myki. The boat between Geelong and Docklands is run by Port Phillip Ferries and crosses Port Phillip with a compulsory stop at Portarlington, so every sailing on the current timetable takes the long way. It does not replace the V/Line train, which is quicker and takes myki; the ferry is chosen for the water rather than the clock. It sails once a day in each direction, mostly at weekends and on public holidays, reaching into weekdays only during school holidays, and the fare shown on the route page grows at checkout because a fuel levy is added separately.
The Westgate Punt is the opposite kind of service: a small passenger boat, with no vehicles, that takes pedestrians and cyclists across the Yarra between Spotswood and Fishermans Bend and spares them a long detour round the West Gate Bridge. On weekdays it runs in a morning and an afternoon commuter block, with nothing in between; at weekends and on public holidays it crosses on demand through the day, and the skipper takes cards only.
Lower down the bay runs a car ferry. Searoad's two catamarans between Sorrento and Queenscliff cross the mouth of Port Phillip every hour from 07:00 to 18:00 from either side, in 40 to 45 minutes, and the fare rather than the timetable rises on peak dates.
Inside the bay, the St Kilda–Williamstown boat is a private passenger service of 25 to 30 minutes, at $22 one way or $34 return for an adult; its operator's own pages disagree on some sailing days, so the route page sends readers to the booking calendar rather than printing a timetable.