floating dock

/F L OW1 T IH0 NG D AA1 K/
noun
  1. 1

    A dry dock which can float, and is submersible when a ship is entering or leaving it.

  2. 2

    A floating pier or dock tied to the shore, which can rise and fall with the water level. Typically used by smaller craft.

Source: https://en.wiktionary.org/wiki/floating%20dock