Washington State Ferries’ vessel Wenatchee, which is in the midst of a major propulsion system and hybrid-electric power upgrade at Vigor shipyard, is expected to return to service in the summer of 2025, WSF announced Sept. 19. Vigor has been working on the vessel since WSF awarded the company a contract in September 2023 to upgrade the agency’s Jumbo Mark II class ferries with hybrid-electric power capabilities and finish needed propulsion system upgrades on the 1998-built Wenatchee, the 1997-built Tacoma and the 1999-built Puyallup. “There are no issues with the technology itself, but as is common with major vessel retrofits,…