extraction over long distance without driving on the ground
extracting in steep terrain (uphill)
bringing trees to a site where machines for delimbing and cross-cutting can operate
Compared with full trees, tree-lengths offer less resistance to drag and are easier to move within the stand
Compared with full trees, no nutrient removal
Limitations, threshold
distance limited by the length of the cable, often more than 100 m
distance limited by the weight of the cable that must be pulled by the worker, so on flat terrain not more than 50 m, downhill wider distances are possible
cable cannot be pulled uphill, therefore no downhill extraction over longer distance
Main use
in stands where fully mechanized methods are not applicable due to ground conditions, tree species (large broadleaf trees, e.g.)
with wider distance of trails, where trees must be pulled into the reach of the crane of a machine
in combination with extraction by means of a tractor