This crossbow is supplied with a special extension plus fishing rod spoole, allowing foresters and / or scientists to transport their equipment to crowns up to 30m or higher.

Specially manufactured bolts are shot with a destined “chord” into the crown, which is used for the following transport.

Stronger models like Great Lakes’ Fireforce can be used for even bigger heights.

The maximum performance is needed for example by mountain rangers using the Durango. In situations where employing a helicopter is too dangerous, ropes with the length of more than 100m are shot over ravines for rescuing humans in a bad plight out of the depth.