White Sea small. The main island group is the Solovetsky Islands, located almost in the middle of the sea, near the entrance to Onega Bay. Kiy Island in Onega Bay is significant due to a historic monastery. Velikiy Island, located close to the shore, is the largest island in the Kandalaksha Gulf. The White Sea is a water-filled depression in the block of a continental shelf known as the Baltic Shield. Its bottom is very uneven and contains the Kandalaksha Hollow in the northwest and the Solovetsky Islands in the south. Also, the Onega Bay has many small underwater elevations. The opening
Arkhangelsk serves as the administrative center of Primorsky District, even though it is not a part of it. As an administrative division, it is, together with five rural localities, incorporated separately as the city of oblast significance of Arkhangelsk—an administrative unit with the status equal to that of the districts. As a municipal division, the city of oblast significance of Arkhangelsk is incorporated as Arkhangelsk Urban Okrug. The mayor (as of July 2017) is Igor Viktorovich Godzish, who was elected in 2015. For administrative purposes, the city is divided into nine territorial okrugs: Nordavia (formerly Aeroflot Nord) airline has its head