An airplane operated by a flag air carrier flying over uninhabited terrain must carry which emergency equipment?

In the context of an airplane operated by a flag air carrier over uninhabited terrain, carrying suitable pyrotechnic signaling devices is crucial for ensuring safety in case of an emergency. These devices, such as flares, are designed to create a visible signal that can be seen from a distance, which is vital for search and rescue operations. They attract attention and help rescuers locate the downed aircraft and its occupants quickly, especially in remote areas where other forms of communication might be limited or non-existent.

The other options, while they may provide certain benefits, do not specifically fulfill the requirement for signaling assistance in an emergency. For instance, colored smoke flares and a signal mirror could also serve signaling purposes but do not offer the same reliability or effectiveness as pyrotechnic devices in certain scenarios. A survival kit for each passenger is important for post-incident survival but does not assist in the immediate signaling process to facilitate rescue. An emergency locator transmitter is also a valuable piece of equipment; however, it functions differently by transmitting a distress signal rather than being a proactive signaling device that visually alerts rescuers.

Thus, the selection of suitable pyrotechnic signaling devices aligns best with the need for prompt rescue efforts in an over-uninhabited terrain