Why it matters
Post-flight debrief is normally a second subscription that only does debrief. Marathon Rank 2 puts the debrief workflow inside AeroCopilot, on the same track your logbook already recorded, at no extra tier. What it detects today is a deliberately small, conservative set — a wrong detection costs a CFI their confidence in the whole tool, so the algorithm is tuned to miss rather than to guess, and it never issues a grade on its own.
Under the hood
- GPS track from in-app auto-tracking
The debrief reads the track recorded by Marathon Rank 9 auto-tracking. Importing tracks from other tools (FIT / KML / GPX) is not wired yet.
- Maneuver detection algorithm
Airplane: steep turn, slow flight, stabilized approach. Helicopter: settling with power, autorotation entry — separate algorithms, never reused across categories.
- ACS gate evaluator
Published ACS tolerances applied per detected maneuver; gate scored Pass / Marginal / Fail, and low-confidence detections are marked "needs review" rather than scored silently.
- Annotation surface for CFI sign-off
CFI flags any gate needing rework; student sees the rework list. No grade is official without that sign-off.
- Syllabus integration
Gate scores feed directly into the lesson-plan progress chart.
Regulatory and safety context
The Airman Certification Standards (ACS) define quantitative gates (e.g., steep turn altitude ±100ft, heading ±10°). A debrief tool is only useful to a CFI if it compares the flown track against those published gates instead of an opinion. That is what the evaluator does, for the maneuvers it detects — and it says plainly which ones those are.