towed unmanned submersible A vehicle towed by rigid cable through the water column at fixed or varying depth with no propulsion and no human operator (e.g. Towfish, Scanfish, UOR, SeaSoar). 2013-08-20 13:53:41.0 SDN:L06::23 SDN:L06::23 SDN:L06::23 2 2 2013-08-20 13:53:41.0 accepted false