The Alpine Coil is a method used by climbers for carrying a rope, such that the rope remains attached to harnesses and ready for use. It is also known as a mountaineer's coil.
To Tie an Alpine Coil:
To carry a coil over your shoulder, bring both ends to the top of the newly made coil and form a bight in one of them.
Wrap the other end as shown and tuck it through the bight first formed.
Pull on the bight to close it and so trap the end.