Climbers are often separated by long distances, unable to see or hear their partners due to rock and wind, dependent only on the tug and tension of the rope for information on whether to stay or advance.
在攀爬距離遠、風大，或被凸出的岩石擋住視線時，彼此看不到，又聽不到，只有靠繩子來傳達行動的訊息。