Abstract: Disclosed is a boat trailer incorporating a pivoting mechanism wherein a stern capture flange serves to secure the stern of the boat so as to prevent the boat from sliding off of the rear of the boat trailer. Specifically, the invention utilizes the weight of the boat itself to trigger the fulcrum action of the pivoting roller mechanism, wherein the boat is mechanically seated in place via the inward contact face of the stern capture flange. Also disclosed is a method for securing a boat to a trailer having a pivoting roller mechanism.