Why would you use a periscope in a submarine?

Answer 1

A periscope is used in a submarine to allow crew members to observe the surface while remaining submerged. It provides a means to gather visual information about the surroundings, such as the presence of ships or land, without exposing the submarine to potential threats. The periscope typically incorporates mirrors and lenses to extend the line of sight, enabling effective surveillance while maintaining stealth. Additionally, modern periscopes may include advanced technology, such as cameras and sensors, for enhanced situational awareness.