This stage of operation includes the lowering/hoisting of the spreader/container between the safety height setting and the final landing on the chassis and the locking and unlocking of twist locks.This stage of operation shall be done either manually or semi-automatically as the path AB. The hoisting down and the twist lock / unlock operation shall be done manually by the operator. During hoisting up, the operator must hoist up about 1.5 m before he can activate the automatic operation.