Nature. One of the largest and longest rivers of Siberia, which takes the beginning in the Baykal lake's area and falls into Arctic ocean. Narrow river areas and a large sea area near the mouth. Severe northern forest landscapes, mountainous banks.

Towns and ports. Big city - Yakutsk. Main ports: Yakutsk, Osetrovo (Ust-Kut), Kirensk, Peleduy, Lensk, Olekminsk, sea port Tiksi.

Routes. Main: Osetrovo - Yakutsk, Osetrovo - Tiksi, other routes from Yakutsk. Passenger lines.

Motor ships. Projects 737, 646, Q-065.