Which year marked the first operational ground RADAR station?

• A. 1939
• B. 1842
• C. 1972
• D. 1946

Answer: (A)

The first operational ground RADAR station was established in 1939, marking a significant development in military technology and air traffic control. This year is notable because it aligns with the onset of World War II, during which the need for efficient detection and tracking of enemy aircraft became paramount. The introduction of ground RADAR systems provided crucial advantages in early warning and situational awareness, influencing the outcomes of various battles by enhancing the ability to monitor aerial threats.

While the other years mentioned do represent notable events in technology and history, they do not pertain to the establishment of operational ground RADAR systems. For instance, 1842 is associated with earlier scientific advancements but is well before the advent of RADAR technology, which relies on principles of electromagnetic waves formalized in the 20th century. Additionally, the years 1972 and 1946, while relevant in the broader context of technological advancements and military application, do not correspond to the first introduction of ground RADAR systems like 1939 does. Thus, the significance of 1939 lies in its foundational role in the development and operational use of RADAR technology.