Who commanded and worked an Admiralty floating dock

Was an Admiralty floating dock a commissioned ship, and who operated it?

It occupied a grey area: a 30-60-person technical crew ran the dock, while repair specialists usually came from tenders or shore units.

The command pairing could include a lieutenant commander from the engineering branch and a shipwright or naval-constructor officer. A mixed permanent crew of roughly thirty to sixty people managed ballast, cranes, and the dock itself. Welders and other repair trades normally arrived from a repair ship, tender, or shore establishment when a vessel entered. The dock was therefore more than an inert pontoon but not quite an ordinary commissioned warship. Understanding that division of labour explains how mobile infrastructure became an operational repair facility.