Washington State Ferries provides transit services in Washington.
Online includes: VesselWatch stop predictions (Bus and Ferry). Trip updates (Bus and Ferry). Weather Information with the all lines option (All Travel Modes). Washington DOT On Twitter with the all lines option (All Travel Modes). Vehicle locations with per stop, per line, and per direction options (Bus and Ferry). Washington DOT On Facebook. News with the system-wide option (Ferry).
You can access any of these services from Stop Times, Route Map / Vehicle Locations, or the Online area.