Thanks to Mark for the photo. The state ferry under tow in Elliott Bay is M/V Walla Walla, headed for the Vigor shipyard on Harbor Island. This is the ferry that ran aground on Bainbridge Island in April. That problem was attributed to contaminated fuel. But that’s not why it’s going in for repairs. This is because of recent propeller damage, Washington State Ferries spokesperson Ian Sterling tells WSB. The most-recent WSF weekly update explains:

Following a significant shudder felt aboard Walla Walla Friday, we sent divers to inspect the ferry’s propellers and they found damage to one of them. The vessel will need to go into dry dock so the prop can be replaced. If no other issues are found, the boat is expected to be out of service for up to four weeks. Until it returns, plan for reduced vehicle capacity on some routes.

Also currently at Vigor is M/V Wenatchee, for conversion to hybrid-electric.