CSS Hudson: sequence inside control room on ship, two men at work, electronic apparatus, magnetic tape readers, echo sounders. ZOOM OUT and TILT UP to profile chart of undersea floor. Several shots of chart. MS of digital counter. Sequence on dredge being lowered over the side as Grant Bartlett supervises. Incidental shots of men waiting for dredge to come up. Cut to winch turning. Over-the-side shot of dredge being pulled up. TILT UP of men looking down. Shot of dredge being lowered to deck and Bartlett fishes out a couple of small samples from otherwise empty dredge.