8905灯船、消防船、挖泥船、浮式起重机等特殊用途船舶；浮船坞；浮动或潜水式钻探或生产平台

Light-vessels, fire-floats, dredgers, floating cranes, and other vessels the navigability of which is subsidiary to their main function; floating docks; floating or submersible drilling or production platforms