What type of aircraft is required to have strips posted during ERAM operation?

The requirement for strips to be posted during ERAM (En Route Automation Modernization) operation specifically pertains to nonradar flights. Nonradar flights, which operate outside the coverage of radar systems, rely heavily on strips for the coordination, tracking, and documentation of flight data. This practice ensures that air traffic controllers can effectively monitor these flights and maintain situational awareness without the aid of radar technology.

By using strips for nonradar flights, controllers can keep accurate and organized records of flight intentions, altitudes, and routes, which are essential for maintaining safety in the airspace. This method of documentation is particularly important because, in the absence of radar, controllers do not have real-time information about the aircraft's position or flight status.

In contrast, other types of flights, such as emergency aircraft or commercial flights, typically have different operations that may not necessitate the same level of scrutiny through strips when radar coverage is available. Thus, the requirement is specifically aimed at nonradar flights to ensure their safe management within the airspace system.