Relief shown by hachures and spot heights. Depths shown by soundings and isolines.; Title translation: Map of the southwestern part of the sea of Okhotsk. Compiled from the surveys of 1830-1885. Published by the Main Hydrographic Office of the Admiralty in 1887.; Includes 7 inset maps, list of navigational points with coordinates data and profile view of the mouth of the Uda river.; Inset maps: Levyazhya Bay, Ayan Bay, Abrek Bay, Konstantina Bay, Uda River Estuary, Shchastya Bay, and Kuegda Harbor; Inset maps: Guba Lebi︠a︡zhʹi︠a︡ -- Zaliv Ai︠a︡nʺ -- Bukhta Abrekʺ -- Zaliv Vel. Kn. Konstantimʺ -- Nagli︠a︡dnyĭ plan Ustʹi︠a︡ ri︠e︡ki Uda -- Vkhodʺ vʺ zal. Schastīi︠a︡ -- Gavanʹ Kuėgda.; "No. 290" -- handwritten bottom right marginGrayscale;1:...