The crane refresher course covers the theoretical aspects of using a crane as well as tips and guidelines for safe use of a crane. A crane operator must be certified by an in-class with practical training every 3 years. This refresher course is to reinforce the participant with the basic components of a crane and means by which to ensure that all parts are in good working orders as well as the standard hand signals. The course also covers information on basic rigging theory and the proper procedures for raising, moving and lowering loads.