Which statement is true regarding mousing procedures?

The statement about mousing procedures that is true is that it prevents loads from slipping off hooks. Mousing involves securing the load to the hook, which is particularly important in rigging and lifting operations to ensure safety and stability during movement. This procedure typically includes the use of materials such as wire or rope that secure the load to the hook, effectively minimizing the risk of the load detaching or falling, which could cause accidents or damage.

This precaution is essential regardless of the size of the load or equipment involved. Proper mousing procedures are part of best practices in lifting and rigging, applicable to various scenarios to maintain safety standards. Other options do not accurately represent the essential nature of mousing, as it is not merely about adding load, only necessary for large equipment, or requiring a special hook type. Mousing is a fundamental technique used in a wide range of lifting operations, emphasizing its importance in ensuring operational safety.