HST-2, formerly named USNS Puerto Rico and Alakai, is a vessel owned by the United States Navy Military Sealift Command. She was originally Hawaii Superferry's first high-speed ferry. The vessel was later chartered by Bay Ferries Limited to operate a ferry service between Maine and Yarmouth, Nova Scotia.

Bay Ferries Limited, or simply, Bay Ferries, is a ferry company operating in eastern Canada and is headquartered in Charlottetown, Prince Edward Island, Canada. It is a subsidiary of Northumberland Ferries Limited and a sister company to the defunct Bay Ferries Great Lakes Limited.