Sources: drone software and rules

Checked on 25 October 2026

• USI, Get Part 108 Ready (last verified 25 September 2026): timeline, OIRA review, proposed permits, certificates, weight, operations supervisor, data service providers, right-of-way, Remote ID.
• AVweb, 29 January 2026: the reopened comment period on right-of-way and electronic conspicuity.
• EASA, EU UAS Regulation: specific category: STS-01, STS-02, PDRA-01, SORA, LUC.
• EASA, operational authorisation: the specific-category pathways.
• FAA Safety Team, Remote ID talking points (August 2023): who must comply, the three ways, the broadcast content, the compliance date.
• Pix4D documentation: the flight height and GSD formula, real focal length.
• ArduPilot discussion forum: BSD and GPL implications, frame flexibility, field performance (community views; the thread warns that both projects have changed since).

Built-in assumptions

• Camera presets use typical public specifications for 1-inch, 4/3 and full-frame mapping cameras; check your own camera's figures.
• Default overlaps (75% front, 65% side) are common starting points, not rules.

Open points

• The final text of Part 108, once published.
• PDRA-02 and PDRA-03 status in EASA's latest documents.

Added on 26 October 2026 (Part 107)

• FAA, becoming a certificated remote pilot: eligibility, the seven steps, Part 61 route (ALC-451), recurrent courses ALC-677 and ALC-515.
• eCFR, 14 CFR part 107 subpart B and subpart C: operating limits, eligibility, recency, retesting, knowledge areas.
• FAA, UAG sample questions (10 August 2021): 46 sample questions; the full test has 60.
• FAA, register your drone and FAA, Remote ID.
• FAA, airman knowledge testing matrix (revised 24 April 2023): UAG, 60 questions, 2 hours, minimum passing score 70, minimum age 14. This closes the earlier open point on time and pass mark.
• Open point: the test fee is not on any FAA page we read; the $175 shown is widely reported and marked as such.

Second review, 26 October 2026

• PX4-Autopilot licence file (BSD 3-Clause) and ArduPilot licence page (GPL v3): the licence facts now rest on the projects' own texts rather than on the forum thread alone.
• Part 108: no Federal Register publication found in a search on 26 October 2026; the USI status of 25 September 2026 still stands.