Nature. One of the largest river systems of the world (with tributaries). Irtysh takes the beginning in China, Ob - in Altay and falls into Arctic ocean. Plain river areas and a large sea area near the mouth (Obskaya guba). Various climatic zones.

Towns and ports. Big cities, ports: Novosibirsk, Omsk, Barnaul, Tomsk, Tyumen, Khanty-Mansiysk, Nizhnevartovsk, Surgut, Salekhard. Industrial, scientific and cultural centers.

Routes. Various from Omsk, Novosibirsk, Tyumen, Salekhard. Passenger lines.

Motor ships. Projects 646, 785, 305 and 860, including those modernized for increase of the comfort.