THIS IS A ONE DAY COURSE. THE CARD IS GOOD FOR THREE YEARS. PREREQUISITE: YOU WILL NEED TO TAKE THE HOISTING/RIGGING & HAND SIGNALS COURSE PRIOR TO TAKING THE REFRESHER UNLESS YOU HAVE 3-5 YEARS OF EXPERIENCE WITH RIGGING AND HAND SIGNALS FOR CRANES THEN YOU CAN TAKE THE REFRESHER WITHOUT TAKING THE INITIAL COURSE