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.

A cable drag system having a drive subsystem and a tailhold on opposing sides of terrain for hauling equipment or loads. The device may include a carriage with load attachment, a mainline cable connected to a mainline winch and to the carriage to pull the carriage towards the winch. A haulback cable connected to a haulback winch and to the carriage pulls the carriage away from the winch. A drive subsystem may include: a first electric motor connected to the mainline winch; a second electric motor connected to the haulback winch; a DC bus connected to an electrical power source and an electric power storage; an electric drive controller operatively coupled to the DC bus and to the first and second electric motors, the drive controller arranged to provide power to or regenerate power from the electric motors. The result is more energy efficient than previous cable drag systems.

A cable drag system having a drive subsystem and a tailhold on opposing sides of terrain for hauling equipment or loads. The device may include a carriage with load attachment, a mainline cable connected to a mainline winch and to the carriage to pull the carriage towards the winch. A haulback cable connected to a haulback winch and to the carriage pulls the carriage away from the winch. A drive subsystem may include: a first electric motor connected to the mainline winch; a second electric motor connected to the haulback winch; a DC bus connected to an electrical power source and an electric power storage; an electric drive controller operatively coupled to the DC bus and to the first and second electric motors, the drive controller arranged to provide power to or regenerate power from the electric motors. The result is more energy efficient than previous cable drag systems.