Final answer:
The question references an escape ladder on a ship, but none of the provided excerpts describe an escape ladder used in such context; they depict different escape scenarios in other settings.
Step-by-step explanation:
The escape ladder mentioned is likely from a story or novel, but based on the given passages, it appears that no specific escape ladder was used on a ship.
Instead, these passages provide various contexts involving escape or safety scenarios in different situations. One mentions an air tube leading to safety, another talks about the Ivory landing on the second floor, and yet another discusses an escape through a trap door on the side of a mountain.
None of these excerpts explicitly describe an escape ladder leading to safety on a ship.