 A regular international ferry service provided by Brittany Ferries operates from Millbay taking cars and foot passengers directly to France ( Roscoff ) and Spain ( Santander ) on the three ferries , MV <unk> , MV Bretagne and MV Pont @-@ Aven . There is a passenger ferry between Stonehouse and the Cornish hamlet of Cremyll , which is believed to have operated continuously since 1204 . There is also a pedestrian ferry from the Mayflower Steps to Mount Batten , and an alternative to using the Tamar Bridge via the Torpoint Ferry ( vehicle and pedestrian ) across the River Tamar . 
