What does the term "last" refer to in a high fidelity source context?

In the context of high fidelity sources, the term "last" refers specifically to the last contact altitude recorded or reported by that source. High fidelity sources provide detailed and accurate information about various parameters, including altitude, which is crucial for various operations. The "last contact altitude" signifies the most recent reliable data reported, which is essential in scenarios such as air traffic management, mission planning, and situational awareness.

Understanding this term is vital because it helps operators make decisions based on the latest verified information, ensuring safety and effectiveness in operations. The focus on the last reported value ensures that decisions are made based on current conditions rather than outdated or potentially inaccurate data.