I always carry extra emergency line in a small coil....
There is a method of securing a long length of light line into a circular roll that I use for my ice fishing safety line. I learned it from the guys in 103 Rescue Helicopter Sqn. They use it to secure the drop line and when it is dropped the line unties as it falls. Try this with some para cord. It is a great way to carry a long cord in a compact manner.
Take five rounds of the line and form a coil about 10 inches across. Use masking tape and put a single strip around the coil at four points [it rips away easily]. The remainer of the line is secured around this coil by slipping loops of line, alternating left, right, left, right, under, over, under over, into each other. Work the slip loops through to the end of the line and secure it.
When needed, simply untie the securing knot and pull on the end of the line. It will unravel quickly.
I hope this explanation makes sense. I will try to do one up and take some pictures for posting later. Or... if someone else already has this one on file perhaps they could share... PTYFNA. D.