Abstract: An attachment device for quickly and conveniently attaching a downrigger release mechanism to an associated downrigger cable. The device includes a generally one-piece body which defines an internal cavity for receiving the downrigger cable. An arcuate access slot is defined by the body and communicates with the internal cavity. This arrangement permits the downrigger cable to be flexed and inserted laterally into the internal cavity, with relaxation of the downrigger cable thereafter retaining the cable within the cavity.

Abstract: A collapsible downrigger arm assembly is disclosed which is configured for use with an associated downrigger system. The arm assembly includes a plurality of elongated, cylindrical arm sections positionable in longitudinally aligned, end-to-end relationship. The arm sections can be conveniently and releasably secured together by a releasable joint construction which is provided between each adjacent pair of the arm sections. Each joint construction has been particularly configured to resist vibration-induced loosening of the joint and bending flexure of the arm assembly, and thus includes a mating threaded shank and bore arrangement, a vibration-resisting support boss and a mating socket, and associated cooperating locking surfaces which are urged into abutting relationship attendant to disposition of the threaded shank in the associated threaded bore.