What does the NATO marker that spells out "ATOM" warn you against?

The NATO marker that spells out "ATOM" serves as a warning for residual radiation. This designation indicates that individuals should be cautious in the area because of the potential presence of radioactive materials, which could be a result of nuclear activities or fallout. The marker ensures that personnel are aware of the risks associated with exposure to radiation, which can have serious health consequences.

Understanding this specific marker is essential for maintaining safety protocols in environments where nuclear materials may have been used or where nuclear weapons have been detonated. It emphasizes the need for protective measures when entering these areas.