The Marlborough harbourmaster has set 187 metres as the maximum length for vessels entering the Tory Channel to access ports at Picton and Shakespeare Bay.
Port Marlborough says the wharf and infrastructure at Picton and the Interislander wharf could last until beyond 2029 if the right maintenance programme is in place.
Port Marlborough has seen a 55.3% increase in the number of ferry and cruise passengers through its port this year.