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Re:How ski lifts are installed: Vail's new Chair 5 (2011) [v... by laurencei on Sunday April 09, 2017 @10:43PM (#14075630)
Medical helicopters usually have a firing bolt/cuter that the pilot controls.

In the event there is a risk to the helicopter due to the winch operation (such as the line becoming stuck in some tress below) - the pilot has the ability to cut the cable to ensure the helicopter is not compromised.

Re:How ski lifts are installed: Vail's new Chair 5 (2011) [v... by robryk on Monday April 10, 2017 @06:16PM (#14083023)
So why does the following manual go to such lengths to prevent the winch line from ever being tied to the ground?

http://www.raf.mod.uk/rafsearchandrescue/rafcms/mediafiles/7...