… Light-vessels, fire-floats, dredgers, floating cranes and other vessels the navigability of which is subsidiary to their main function; …
Explanatory notes
… 89.05 ‑ Light‑vessels, fire‑floats, dredgers, floating cranes, and other vessels the navigability of which is subsidiary to their main function; … derricks, cranes, grain elevators) and pontoons clearly designed to serve as a base for these machines. …