Why is "Chain boat navigation on the Elbe and Saale rivers" trending?

Wikipedia Overview

Chain boat navigation on the Elbe and Saale rivers was a special type of ship transport that dominated motorised inland shipping on the Elbe and Saale river in the second half of the 19th century. A chain tug pulled several barges along a chain laid in the river. Until chain boat navigation revolutionised inland shipping in Germany from 1866 onwards, initially on the Elbe, towing was the predominant type of propulsion for upstream ships. After the chain was removed, up to 28 chain tugs sailed upstream of the Elbe over a total distance of 668 kilometres. From 1890 onwards, the importance of chain shipping in the area of the lower Elbe continued to decline in favour of paddle steam tugs and was completely discontinued here by 1898. On the Upper Elbe, it was able to survive until 1926/27 and was then only used locally in Germany until 1943 in three short, particularly difficult sections of the Elbe. From 1943 to 1945, the last section of the route in Germany was the short section in Magdeburg, where chain boat navigation on the Elbe had begun. In Bohemia, it was still used until 1948. Chain boat navigation existed on the Saale from 1873 to 1921.