Boarding stairs

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Boarding stairs, sometimes called a boarding ramp, or a gangway in the case of ships,^[1] are devices, designed to safety standards,^[2] which passengers and crew use to board a ship or an aircraft when no built-in stairs are available. Larger aircraft may use one or more fingers attached to the terminal building for passenger boarding, but boarding stairs are used when these are not available or it is impractical or too expensive to use them.^[2]