What does "ISP" stand for in Instrument Flying?

The term "ISP" is commonly understood in the context of flying instruments to refer to "Integrated System Performance." This concept encompasses how various navigational and performance systems within an aircraft work together to ensure safe and efficient flight, particularly when flying under instrument flight rules (IFR).

Integrated System Performance involves understanding the interactions between various components such as navigation systems, autopilots, and other electronic displays that provide critical information to the pilot. It emphasizes the importance of these systems functioning cohesively to maintain desired flight paths and attitudes, especially when visual references outside the cockpit are limited.

In contrast, the other terms presented do not accurately reflect established concepts in instrument flying. "Instrument Skewed Patterns" and "Intermediate Stability Protocol" do not have recognized meanings in aviation terminology, while "Instantaneous Speed of Pitch" does not pertain to the systems performance but rather describes a specific aspect of aircraft dynamics that is generally not referred to with this acronym. Thus, understanding "Integrated System Performance" is vital for pilots operating in instrument conditions, as it reflects the comprehensive nature of modern avionics and flight management systems.