It also proposes circular routes in Waitemata Harbour similar to successful operations in Sydney, and vehicle ferries to Wynyard Wharf or Mechanics Bay from Devonport, Bayswater and Birkenhead.
"With relatively little effort and expenditure, certainly in comparison to the [$2.86 billion underground] City Rail Link, many vehicles can be taken off the severely congested choke point of the harbour bridge."
The submission - which is yet to be presented among 719 received by Auckland Transport on a regional public transport plan for hearings which began yesterday - notes that vehicle ferries plied several harbour routes until the bridge opened in 1959.
Sealink says its services are wholly unsubsidised; the overall recovery of Auckland ferry costs from fares averaged 78.4 per cent last year compared with 47.7 per cent for buses and 26.3 per cent for rail.
By boat
Suggested new services include:
* Howick to Auckland via St Heliers, Kohimarama and Devonport
* Gulf Harbour to Auckland via Browns Bay, Takapuna and Devonport
* Circular route between CBD, Devonport, Stanley Bay, Bayswater and Wynyard Wharf.