What is do submarines have windows?

Most submarines do not have windows because they can compromise the structural integrity of the vessel and make it vulnerable to the extreme pressures of the deep ocean. Instead, submarines use periscopes, cameras, and sonar systems to see outside. Some submarines may have small viewing ports, but these are generally limited in number and size.

The use of windows in submarines is also restricted due to the risk of water leakage and the need for the vessel to maintain its stealth capabilities. Additionally, the ability to see outside is not as critical for submarine operations as it is for surface ships, as submarines are designed to operate underwater and rely on advanced technology for navigation and surveillance.

Overall, the lack of windows in submarines is a design feature that helps to ensure the safety, functionality, and effectiveness of these underwater vessels.