Davis points out that summer operations add other, often unexpected issues. 예를 들어, 여름철 관광용 체어리프트를 타는 사람들은 겨울철 고객보다 운동 능력이 떨어지는 경우가 많습니다. And they are often unprepared for rough terrain read wearing sandals, or for being exposed to the weather.