Strait Shipping Limited is a New Zealand firm that operates roll-on/roll-off freight and passenger shipping across the Cook Strait, between Wellington in the North Island and Picton in the South Island. Passenger services commenced in 2002 and operate under the Bluebridge brand. Strait Shipping has in the past also operated freight shipping between Wellington and Napier, also in the North Island, and Nelson and Lyttelton in the South Island. The firm started operations in 1992 to compete with the Interisland Line, owned by the then state-owned enterprise New Zealand Rail Limited.