Seine River Steamers early vessels meant that positive traction by pulling on a chain against a deadman or anchor was much more effective. In the 1830s river travel was considered dangerous, so much so that insurers would put a 25 percent premium on cargoes and vessels travelling the route. The Seine is divided into three sections, the lower or Oise section, middle or Paris Section, and upper or Marne section. Ships enter the river at Le Havre through a bad tidal bore. (Victor Hugo's favourite daughter was killed while travelling in a small boat across the bore.) Oceangoing ships can travel to Rouen,
Source of the Amazon River distant source in the Rumi Cruz mountains with the coordinates of -10.732 Latitude and -76.648 Longitude at an elevation of . They also calculated the distance in river miles between the Apurimac River source (Mismi mountain) and the Mantaro River source to the junction of the two rivers. The Apurimac from source to mouth is long and the Mantaro is from source to mouth, thus making the total length of the Amazon longer than previously calculated. In their study of the Mantaro River, Contos and Trepcevich acknowledged that the flow of the river is interrupted several months a year by