What type of device shall be used to secure loads when hoisting?

Using a positive latching device is essential when securing loads during hoisting operations. This type of device ensures that the load remains attached to the lifting equipment at all times, preventing accidental release or slippage while the load is being lifted and moved. Positive latching devices are designed to provide a reliable and secure connection, which is critical for maintaining safety in any lifting operation.

While other devices like weight monitoring devices or locking pins may play important roles in specific contexts, they do not serve the primary function of securing a load during hoisting. Weight monitoring devices are used to gauge the load but do not prevent it from falling, and locking pins are typically used for mechanisms that require locking but are not specifically intended for load attachment during lifting. Safety harnesses are crucial for worker safety when working at heights but are not designed for securing loads. Thus, in the context of securely hoisting loads, a positive latching device is the correct and most effective choice.