What marking indicates a window in an apartment building can be broken for emergency exit?

The Maltese cross is a symbol traditionally associated with fire departments and emergency services, and it signifies that a window can be broken for emergency egress. This marking is crucial in emergency situations, as it indicates to both firefighters and building occupants that the window serves as an accessible exit path if standard exits are obstructed or unsafe to use.

In contrast, the other markings are used for different purposes. A red cross often signifies a medical emergency or a restricted access area and does not denote an emergency exit. The blue circle is typically utilized for indicating safety equipment, while the yellow diamond usually warns about hazards but does not communicate the specifics of an emergency exit route. Understanding these symbols is essential for maintaining safety and ensuring that individuals in an emergency can locate viable exit routes effectively.