An overhead line system includes a plurality of support posts, an overhead line supported by the support posts, a lifting device with which the overhead line is liftable, a suspension device that is connected to the overhead line and is movable in the air as the lifting device winds the overhead line, and a control device. The control device controls the lifting device so as to reduce tension when a predetermined condition relating to a tension abnormality of the overhead line is satisfied.

An overhead line system includes a plurality of support posts, an overhead line supported by the support posts, a lifting device with which the overhead line is liftable, a suspension device that is connected to the overhead line and is movable in the air as the lifting device winds the overhead line, and a control device. The control device controls the lifting device so as to reduce tension when a predetermined condition relating to a tension abnormality of the overhead line is satisfied.

An overhead line system includes a plurality of support posts, an overhead line supported by the support posts, a lifting device with which the overhead line is liftable, a suspension device that is connected to the overhead line and is movable in the air as the lifting device winds the overhead line, and a control device. The control device controls the lifting device so as to reduce tension when a predetermined condition relating to a tension abnormality of the overhead line is satisfied.

A skyline cable logging system in which a skyline carriage runs on a skyline cable (106) between a yarding hauler (101) and a remote mobile tailhold (113) has the remotely controllable mobile tailhold powered and with winch tails which are connected to multiple anchor points (110). With the skyline tensioned so that the mobile tailhold is aerial the winch tails can be varied to traverse the skyline end between anchor points (110). The anchor points (110) can be relocated one at a time to allow the skyline to traverse a large area.