Professional zip-line in, Costa Rica
Professional versions of a zip-line are most typically used as an outdoor adventure activity. In contrast to "flying foxes" professional courses are usually operated at higher speeds covering much longer distances and sometimes at considerable heights. The users are physically attached to the cable by wearing a harness which attaches to a removable pulley. Most courses require the use of a helmet.
Cables can be very high, starting at a height of over 30 feet (9 m), and traveling well over 200 feet (60 m).
Costa Rica is known for their Canopy Tours where a vacationer can zip through the rainforest. The zip-lines are scattered among several platforms, some as high as 130 feet.
Zip-lines are a common way to return participants to the ground at the end of a ropes adventure course.
In past days in the Australian outback, flying foxes were occasionally used for delivering food, cigarettes or tools to people working on the other side of an obstacle such as a gully or river. Australian troops have used them to deliver food, mail and even ammunition to forward positions in several conflicts.