What characteristic defines Modes 1 and 2 of IFF?

Modes 1 and 2 of Identification Friend or Foe (IFF) are specifically designated for military use, providing tactical modes for military target identification. Mode 1 is primarily used for identifying military aircraft in a tactical environment, while Mode 2 is used for specific identification within the military framework. This allows military systems to differentiate between friendly assets and potential threats, facilitating informed decision-making during operations.

The focus of these modes on military applications underlines their importance in enhancing situational awareness and operational safety. They operate differently from civilian modes, which are designed for air traffic management and do not cater to the needs of military engagement and identification. Thus, the defining characteristic of Modes 1 and 2 is their function as tactical tools used for military target identification.