Remotely controllable paravane Robert A. Kirby et al. "Tirpitz" was rendered unfit for combat by Operation Paravane. The cable can then be retrieved and a replacement paravane fitted. The crew of "Ilmarinen" failed to take proper notice of the dragging paravane cable. He also worked for a short period in the Paravane Department of the Admiralty, 1917. Swedish Speed Sailing Challenge' holds people effecting such paravane use. In similar technology, many others prior to 2006 advanced water-kite and paravane electric generating systems. Minesweepers protect themselves with an oropesa or paravane instead of a second minesweeper. It was a paravane, containing of TNT towed by an armoured electric cable.