A jetty is a structure that projects from land out into water. It may also refer more specifically to a walkway accessing the centre of an enclosed waterbody. The term derives from the French word jetée, thrown, signifying something thrown out.A dock (from Dutch dok) is the area of water between or next to one or a group of human-made structures that are involved in the handling of boats or ships (usually on or near a shore) or such structures themselves. The exact meaning varies among different variants of the English language.

Dock may also refer to a dockyard (also known as a shipyard) where the loading, unloading, building, or repairing of ships occurs.