Abstract: A trailer for transporting boats is provided with an automatic centering structure having a pair of equal-length centering cables each having a first exterior end connected to a forward interior portion of the trailer frame, and a second interior end coupled to a snap-hook, which snap-hook is securable to a bow-eye of the boat being loaded onto the trailer. The centering cables position the bow of the boat along the longitudinal center of the trailer frame as the boat is driven onto the trailer under the boat's own power. Bunks or boards are also provided to aid in the centering procedure, for carrying loads, and for structural integrity.