Check out one shipyard application of the MagTether in Korea here!
With Magswitch MagTether 300, tether your equipment or yourself while working above and below water. Turn the lever 180-degrees to switch On/Off 240 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.