Identify the main geographical regions and geographical features indicated by the handwritten annotations on the map. Additionally, explain the meaning of the provided legend symbols.

Geographical Regions and Features:

• Якутск: A major city in Eastern Siberia, known for its diamond mining and extreme cold.
• Хабаровск: A large city in the Russian Far East, a major administrative and industrial center.
• Екатеринбург: A major industrial city in the Ural Mountains, a historical and economic hub.
• Киров: A city in European Russia, known for its historical significance and industries.
• Москва: The capital and largest city of Russia, a political, economic, and cultural center.
• Мурманск: A port city in the Arctic Circle, vital for Russia's Northern Fleet and fishing industry.
• Северный полярный круг: The northernmost of the Earth's five major circles of latitude, marking the boundary of the polar region.
• Моря (likely referring to Arctic seas like the Kara Sea or Laptev Sea): These bodies of water are part of the Arctic Ocean and are significant for navigation, especially during summer months.

Legend Symbols and Their Meanings:

• ---реф (threat/danger): This symbol likely indicates a zone of potential threat or danger, possibly related to natural hazards, military activity, or environmental concerns.
• грайица (border): This refers to the state border of the Russian Federation.
• грайица владений Российской Федерации (border of Russian Federation's possessions): This denotes the administrative or territorial boundaries within the Russian Federation.
• Условные обозначения (conventional symbols): This section introduces symbols used on the map. The specific symbols provided are:
  • -урочищ леднико (ice drift/ice flow): This indicates areas with ice floes or ice drift, common in Arctic regions.
  • -грозица погодие (weather hazard): This symbol likely represents a weather-related hazard or adverse weather conditions.
  • -> контролирование (control/monitoring): This arrow might suggest a controlled area, a route for monitoring, or a path to be controlled.