Check out one shipyard application of the MagTether in Korea here!
With the Magswitch MagTether 1000, tether your equipment or yourself while working above and below water. Turn the lever 180-degrees to switch On/Off 1000 pounds of magnetic hold force. Tether is sealed with a marine grade corrosion resistant coating to hold up to saltwater. Ideal for underwater welding, tethering, military and commercial oil and gas applications.