The portable steps from the gangway down to the waterline.

Usually refers to movable steps or stairs and/or a platform/gangway lowered parallel to the hull over the ship's side to allow access on board for officials, crew or passengers or to ‘accommodate' persons while boarding or leaving the vessel. Usually required by government officials to board upon a ship's arrival. ATP- -Abbreviation [..]

A ladder against the side of the ship to provide access when in harbour but not alongside the jetty or if the ship is at anchor.

A portable flight of steps down a ship's side.

The portable steps from the gangway down to the waterline.

A portable flight of steps down a ship's side.

  A ladder suspended over and inclining down the side of a ship to facilitate boarding the ship from boats.    

a portable flight of steps down a ship's side, used to get from the deck to the pier, wharf, or water level.

A portable flight of steps down a ship's side.

A portable flight of steps down a ship's side.

(nautical) a flight of stairs or a ladder for lowering over the side of a ship for access to and from a small boat.

a retractable ladder with collapsible handrails for safe access to and from ship; hinged to a platform attached to ships sides usually available at port and starboard sides

Movable steps arranged temporary alongside e.g. a quay to allow access on board for officials, crew or passengers.