Abstract: A framework of magnet pods and beams or strongbacks can be quickly and easily assembled to plug a leak in a ferromagnetic container wall. The magnet pods are located on either side of the leak. One or more beams extend between the magnet pods. Each magnet pod has a yoke with plural holes therethrough. The yoke loosely receives the beam. Each beam has lines of holes therethrough all along the beam length. The plurality of holes in the yokes and beams simplifies the alignment of at least one set of holes between the yoke and beam, wherein a pin is inserted to couple the beam to the magnet pod. A clamp is pinned to the beam so as to be adjacent to the leak. The clamp is tightened to exert removable pressure on a patch over the leak.

Abstract: A retrievable boat mooring device for reversible attachment to an off-shore oil platform. The mooring device includes a modified U-shaped hook, one end of which is attached to a cable. A tubular Nylon rope is attached to the other end of the hook, and the cable and the rope are attached to one another. The free end of the cable terminates in a loop for grasping and pulling the cable. The mooring device is secured to the platform by casting the hook over a stationary elongated horizontal support, and is retrieved by pulling on the cable loop, thereby drawing the hook over and away from the stationary horizontal support. The advantage of the present invention over the present state of the art is that it enables one to tie a boat to and untie a boat from an off-shore oil platform without having to come dangerously near the platform.