Typical helicopter operations include the extraction of valuable timber from stands with inadequate road networks, large areas of difficult to reach wind-throw, and sensitive sites where the negative impact on soil and water must be minimized.

Helicopter harvesting is an aerial harvesting system whereby logs are lifted out vertically of the forest and flown to the roadside or drop zone. It was first introduced to Sarawak in 1993 when a major timber company brought in the Sikorsky S-64E to …