What vessels are required to have a Washington title registration card and registration decals to operate on Washington's waters?

In Washington, all motorized vessels, including boats with engines, personal watercraft, and sailboats with motors, are required to have a Washington title registration card and registration decals to operate on state waters. Additionally, non-motorized vessels over 16 feet in length, such as kayaks and canoes, must also be registered. Owners must display the registration decals on their vessels as required by state law.