Obtain not only photographs, but descriptions and drawings of relevant material for your accident. Show its ideal dimensions--its plans, its blueprint.
Figure 66 shows a crawler crane with a drag-line attachment. A drag-line consists of a sliding bucket that is dragged along the ground or sea-bottom for dredging.'
The drag-line used to be the standard form of near-shore dredging until the hydraulic excavator (a far smaller machine that is more compact to transport over long distances) made its appearance.