MS Stena Seafarer is a ro-ro ferry that operates on the service between Larne, Northern Ireland and Fleetwood, England. The ship is different from Stena Leader and Stena Pioneer as this was built to carry passengers rather that freight. Freight is also carried on the service. Seafarer was built in 1975 for Stena Line as Union Melbourne, before being renamed "Union Trader" in 1980. In the same year, the ship was acquired by P&O Irish Sea, becoming Puma, then European Seafarer in 1998.