The carolina boat lift™ is one of the strongest, most stable lifts in the industry. it is often sought after for the roughest water areas. with the up-pressure technique, the lift will add stability to the dock system, especially the lighter weight aluminum structures.. The carolina boat lift™ is one of the strongest, most stable lifts in the industry. it is often sought after for the roughest water areas. with the up-pressure technique, the lift will add stability to the dock system, especially the lighter weight aluminum structures.. The harborhoist boat lift 6600 pound capacity lift has six tanks, a maximum lift capacity of 6600 pounds and can accommodate boats up to 30 feet in length. the harborhoist is a level-lifting frame constructed of aircraft-grade aluminum. it is the most versatile boat lift in the hydrohoist family — perfect for fresh and salt water..