What critical action is necessary when using a jib on a long boom?

When using a jib on a long boom, being cautious when accelerating and decelerating the swing is essential for maintaining control over the load. This is especially important because the dynamics of a long boom can cause significant momentum and inertia as the load swings. If the swing is not controlled properly, it can lead to instability and the potential for accidents, such as the load swinging too far or uncontrollably, which might endanger personnel nearby or damage equipment.

Controlling the acceleration and deceleration helps ensure that the load is swung smoothly and safely to its intended position. This careful management of the swinging motion is crucial in preventing sudden jerks that can destabilize the load or cause it to sway excessively.

In contrast to this correct approach, increasing boom length before lifting can complicate the lift rather than assist it. Launching the load at high speed is inherently dangerous, as it can lead to loss of control. Lowering the load before swinging does not address the mechanical principles at play; swinging should be managed with control and attention to the momentum of the load. Thus, being cautious with the swing's acceleration and deceleration directly contributes to safe hoisting operations.