Might go up and down, but I don't think you can use it to descend/rap. Which of course then means you have to put another device on the line. Which to me then partially negates the effectiveness of having two ropes. Reading between the lines of ODH's original post his reasoning is to increase safety. My reasoning for sometimes using two lines, is safety and speed in swapping over to descent.
Not wrong in my eyes, but just more than one way to skin a cat. |