Moisture, Fog, Clouds, and Frost
Connect dew point, saturation, fog formation, visible moisture, icing, and surface contamination to visibility and aircraft performance.
YOU WILL BE ABLE TO
- 01Identify the rule, source, or principle behind this idea: When temperature approaches dew point, saturation, fog, cloud, or condensation becomes more likely.
- 02Explain the operational effect of this idea: Fog types arise from different cooling and moisture mechanisms and may change quickly with wind or sunlight.
- 03Apply the lesson to a new mission and defend a go, modify, or no-go decision.
01 / MISSION
Begin with the operating problem.
Temperature and dew point converge before a coastal dawn shoot and thin fog begins crossing the site.
02 / CORE BRIEF
What the remote pilot needs to know.
When temperature approaches dew point, saturation, fog, cloud, or condensation becomes more likely.
Fog types arise from different cooling and moisture mechanisms and may change quickly with wind or sunlight.
Frost and icing change aerodynamic surfaces, add weight, and can damage systems; visible moisture and precipitation may exceed aircraft environmental limits before visible ice forms.
03 / PILOT DECISION
Make the call.
Delay until legal visibility, cloud clearance, VLOS, and manufacturer environmental limits are met with stable margin.
04 / FIELD CHECK
Put it into the flight plan.
Track temperature-dew-point spread and actual site visibility, not just a weather-app icon.
05 / KNOWLEDGE CHECK
What does a shrinking temperature-dew-point spread suggest?
Reveal the debrief
Air is moving closer to saturation, increasing the likelihood of fog, cloud, dew, or condensation.
RELATED FAA REFERENCES
Verify before you fly.
- FAA — Aviation Weather Handbook (FAA-H-8083-28B)
- NOAA / FAA — Aviation Weather Center
- 14 CFR Part 107 — current eCFR
- FAA — Remote Pilot Airman Certification Standards
Educational summary only. Current regulation, FAA approval conditions, manufacturer instructions, and site-specific facts control the operation.