Which of the following is an appropriate preflight consideration for drone-based thermal roof surveys?

• A. Battery check
• B. Weather forecast
• C. Permission and regulatory clearance
• D. Insurance

Answer: (C)

Before any drone flight, especially for a roof survey, securing permission to fly and confirming regulatory clearance is essential. This ensures you are legally allowed to operate over the property and to collect data, meeting all local aviation rules, flight restrictions, and privacy requirements. Without this authorization, the flight cannot proceed, regardless of other factors. While a favorable weather forecast and a charged battery are important for safety and data quality, and having insurance is prudent, these do not replace the need for legal authorization to fly. In practice, you may need consent from the property owner and applicable aviation approvals or waivers; securing these permissions first avoids legal issues and flight denial and sets the stage for the remaining preflight checks.