Pontoon bridge unprecedented 730-meter, fortified pontoon bridge across the Scheldt river at the Siege of Antwerp in 1584 to close off water access to the city. In the battle of Saraighat in 1671, the Ahoms spanned the river Brahmaputra at Saraighat over an improviso bridge of boats. In the 1670s, the French devised the copper pontoon; after this point, rivers and canals ceased to present significant obstacles. The early modern period in pontoon use was dominated by the wars of the 18th and 19th centuries during which the art and science of pontoon bridging barely changed. This however did not stop all
Baltic Cable the only crossing of two submarine HVDC cables in the Baltic Sea and one of the only few worldwide. From the landing point at the southern coast of Sweden at , the Baltic-Cable runs a further as an underground cable until a point east of the road E6 at , where inside a fenced area the transition from underground cable to overhead powerline takes place. From there the powerline runs as overhead line over two suspension pylons in north-northwesterly direction until the first strainer at . There the line turns into north-northeasterly direction and runs over seven suspension pylons past