Which statement is true about volcanic hazard zones (VHZ) when flying?

The statement that only day VMC (Visual Meteorological Conditions) operations are permitted in volcanic hazard zones (VHZ) is correct. This is because flying in these areas requires heightened situational awareness and visual references, which are significantly enhanced in VMC conditions during daylight hours. Volcanic activity can produce ash clouds and other hazardous conditions that impair visibility and can be dangerous to flight safety.

When flying in or near VHZ, pilots must ensure that they have adequate visibility to navigate safely, which is why operations are restricted to VMC conditions during the day. This approach promotes safety by ensuring that pilots can see potential hazards and manage their flight paths effectively.

In contrast, flight into these zones at any time is not permitted due to the potential dangers, and temporary zones are not limited to being established at night. Furthermore, pilots are always required to check weather conditions before flying, particularly when operating in areas with potential hazards such as active volcanoes. These protocols are in place to promote safety and mitigate risks associated with volcanic activity.