8.50 Assess satellite and radar Imagery, and non-aviation-specific weather information.

Satellite and radar imagery can be useful tools for VFR pilots when assessing the general weather situation. They help build a picture of cloud, precipitation, frontal activity and the movement of weather systems.

However, they should be used to support, not replace, aviation weather products such as METAR, TAF, GRAFOR, SIGMET, AIRMET and area forecasts.

8.50.2 With respect to NZ VFR operations, using satellite imagery, identify the following:

Satellite imagery shows cloud patterns over a wide area. It is useful for identifying areas of stable or unstable air, frontal cloud bands, and the likely position of pressure systems.

(a) areas of stable and unstable air;

Stable air is often shown by:

• Widespread layered cloud.
• Smooth, even cloud sheets.
• Stratus or stratocumulus type cloud.
• Poor visibility or drizzle may be present.
• Less vertical cloud development.

Stable air may give smoother flying conditions, but can still create poor VFR conditions due to low cloud, mist, fog or reduced visibility.