Name two indicators of deteriorating weather near an LZ.

• A. Sudden wind shifts and reduced visibility due to clouds/fog.
• B. Sunny skies with clear visibility.
• C. Stable noise level and predictable rotor wash.
• D. Equipment malfunction alarms.

Answer: (A)

The main concept here is recognizing weather cues that signal danger near the LZ. Sudden wind shifts are a key indicator because they make the air around the landing zone highly unpredictable. A helicopter relies on steady, predictable air currents during approach, hover, and touchdown; when winds shift abruptly, it can cause unintended drift, attitude changes, or a loss of control margin just as you’re trying to place the aircraft precisely on the spot. Reduced visibility due to clouds or fog compounds the risk by obscuring the LZ itself and any hazards around it, as well as limiting your ability to judge height, distance, and the movement of rotor wash. When you see both of these together, they point to worsening weather that can quickly undermine safe operation near the LZ.

By contrast, sunny skies with clear visibility suggest favorable conditions, not deterioration. Stable noise levels and predictable rotor wash are environmental cues you might use to gauge how the aircraft is behaving, but they aren’t weather indicators. Equipment malfunction alarms flag mechanical problems rather than weather changes, so they don’t signal deteriorating weather around the LZ.