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UFO is the familiar public term for an unidentified flying object. UAP is the broader term used by the U.S. All-domain Anomaly Resolution Office (AARO) for anomalous detections that may occur in the air, at sea, in space, or across more than one domain. Neither label identifies a cause. A report remains “unidentified” when the available evidence is not sufficient to attribute it to a known object, activity, or actor.
UFO and UAP are related terms, not exact synonyms
People often use UFO and UAP interchangeably, but they do different jobs. UFO is an everyday phrase centered on a flying object that an observer cannot identify. UAP, short for Unidentified Anomalous Phenomenon, is the formal term in AARO’s fiscal-year 2023 glossary. It covers sources of anomalous detections in one or more domains that are not yet attributable to known actors and are not readily understood by sensors or observers.
| Comparison | UFO | UAP |
|---|---|---|
| Literal emphasis | An unidentified flying object | An unidentified anomalous phenomenon |
| Domains implied | Primarily the air | Airborne, seaborne, spaceborne and transmedium detections |
| Typical setting | Everyday public conversation and media | Defined U.S. government and defense reporting context |
| What the label establishes | Only that the observer has not identified what was seen | Only that available evidence has not produced a positive attribution |
| What the label does not establish | It does not establish extraterrestrial origin | It does not establish extraterrestrial origin, advanced technology or a threat |
The terminology shift is therefore about scope and precision, not proof of a new category of object. AARO’s definition can include a radar return over water, a space-based observation, or an event that appears to move between environments. Calling every such event a UFO would use a narrower word than the official category requires.
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What “unidentified” means in an investigation
In AARO’s explanation, an unidentified case is an observation for which investigators cannot make a positive attribution from the evidence available. A missing or inadequate sensor record can be enough to prevent attribution. “Unidentified” describes the state of the evidence; it is not a conclusion about where an object came from.
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Three conclusions that are often confused
- Identified: The observations and supporting data are consistent with a known aircraft, balloon, drone, satellite, natural event, sensor effect or other attributable source.
- Unresolved: Investigators cannot make a positive attribution because the information is incomplete, contradictory or too poor in quality.
- Extraordinary-origin claim: A separate claim that an event is extraterrestrial, non-human or otherwise beyond known explanations. The UAP label does not provide that evidence.
AARO’s FAQ states that no single explanation accounts for most reports and that some remain unidentified because sensors did not collect enough information for positive attribution. That is why an unresolved report should not be presented as confirmation of a remarkable origin. AARO summarizes its approach with the institutional statement, “We will not rush to conclusions in our analysis.”
Who should report, and where?
The correct reporting route depends on the observer’s role and the circumstances of the observation. AARO’s current instructions distinguish operational military reporting, civilian aviation reporting, a restricted historical-program process and the general public.
| Situation | Route described by AARO | Who receives it | Important boundary |
|---|---|---|---|
| Military or Department of War civilian sees an event during operations | Use the person’s command or service reporting channel under current operational instructions | The relevant military or Department of War chain and designated service systems | Do not redirect an operational report to AARO’s historical-program web form |
| Civilian pilot observes something unusual | Report promptly to air traffic control | Air traffic control; AARO receives UAP-related pilot reports from the FAA | This is an aviation reporting route, not a universal public portal |
| Current or former government employee, service member or contractor has firsthand knowledge of a U.S. government UAP program or activity | Use AARO’s historical-program reporting process | AARO’s historical-program intake | It is not for ordinary sightings, hearsay or classified/sensitive material |
| General-public sighting | There is no general public route identified in the current instructions | AARO says it will announce when a public reporting mechanism is available | Do not use the historical-program form as a general sighting form |
Military and Department of War personnel
An operational observation belongs in the established command or service process. Those channels can capture mission context, classified sensor information and immediate safety concerns in a way a public web form cannot. Follow the current instructions issued by the person’s service or organization. AARO’s historical-program form is not a substitute for that process.
Civilian pilots
A civilian pilot should promptly tell air traffic control about an unusual observation, especially when it could affect separation, navigation or flight safety. The FAA is a source of UAP-related pilot reports for AARO. The official guidance describes this pilot-to-ATC route; it does not describe a single public website that every observer can use.
People with firsthand knowledge of a government program
AARO’s historical-program process is limited to current or former U.S. government employees, service members and contractor personnel who have firsthand knowledge of a U.S. government UAP program or activity. “Firsthand” matters: the form is not intended for rumors, secondhand stories or a general account of something seen in the sky.
Do not place classified or sensitive information in that web form. Use the authorized secure reporting route for protected material. If the information is simply a personal sighting with no firsthand knowledge of a government program, this channel is the wrong one.
Members of the general public
AARO’s current reporting page says it will announce when a public reporting mechanism is available. Until that announcement, a member of the public should not assume that the historical-program form accepts a normal sighting. If the observation concerns immediate danger, an aircraft hazard or an emergency, contact the appropriate emergency or aviation authority rather than waiting for a UAP-specific process.
How to report a civilian aviation observation
The official material identifies the route rather than prescribing a special consumer form. A practical sequence for a civilian pilot is:
- Maintain flight safety first. Keep the aircraft under control and follow air-traffic instructions. Do not maneuver merely to obtain a better view.
- Tell air traffic control promptly. State the time, approximate position, altitude, direction of travel and any immediate conflict or hazard in the format ATC can use.
- Record details after the safety-critical phase. Note what was visible, for how long, the apparent motion, weather and lighting, and whether the observation was visual, instrument-based or both.
- Preserve original records. Keep the unedited image, video, cockpit display capture or log entry, along with the device and time settings. Editing a copy for sharing should not replace the original.
- Follow the normal aviation reporting requirements. The FAA-to-AARO path is based on reports entering the aviation system; it is not a promise that every pilot observation will receive an individual public case determination.
These documentation practices are practical ways to retain context. They are not a mandatory AARO equipment list.
What evidence helps investigators?
AARO identifies two especially useful examples: higher-resolution video with associated metadata, and measured radio-frequency observations that include GPS position and timestamps. Better data can support comparison with known aircraft, satellites, balloons, drones, weather and sensor behavior. It still does not guarantee a resolution.
Video and photographs
- Keep the highest-resolution original file rather than only a compressed social-media copy.
- Retain metadata when available, including capture time, device information and any recorded location or orientation.
- Record what the camera was attached to, the field of view, zoom level and whether digital stabilization or other processing was active.
- Write down the observer’s position, viewing direction, weather, lighting and duration while those details are fresh.
Resolution and metadata answer different questions. A sharp image may still lack distance or scale; metadata can establish when and how it was captured but cannot by itself identify the object.
Radio-frequency and instrument data
Measured RF observations are more useful when they include GPS location and timestamps. Those fields allow analysts to compare a signal with the observer’s position, other sensors and known activity at the same time. A screenshot without the underlying measurement, timing or instrument context carries less analytical value.
Context from multiple sensors
Investigators look at what the observation supports as a whole. A visual report can be checked against radar, infrared, communications, satellite information, weather and air-traffic records when those records are available. An apparent extraordinary maneuver may look different once distance, parallax, camera motion or a tracking-mode change is understood.
Preserving evidence without contaminating it
Make working copies for enhancement or sharing, but keep the original file unchanged. Record when a copy was made and what was changed. Do not add arrows, captions or frame interpolation to the only surviving version. Preserve both the recording and the surrounding facts: who captured it, where, when, with what equipment and under what conditions.
How AARO-style analysis differs from a sighting report
A report is an account of an observation. An investigation tests that account against data and possible explanations. The labels overlap in conversation, but the tasks are different.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches- Receive and classify the report. Analysts establish who reported it, which channel supplied it and whether the event is operational, aviation-related or historical-program information.
- Check jurisdiction and sensitivity. Classified or protected material must remain in an authorized system. A historical-program submission is screened for eligibility and firsthand knowledge.
- Preserve the source record. Original video, sensor files, timestamps, location and instrument settings are more valuable than a repost or verbal retelling.
- Assess data quality. Analysts ask whether the sensors were calibrated, whether the time and position are reliable, and whether the file contains enough detail to estimate distance, speed or size.
- Compare with known explanations. Aircraft, balloons, drones, satellites, atmospheric effects, birds, reflections, camera artifacts and sensor-processing effects are considered where the evidence fits.
- Assign an outcome supported by the record. The result may be an attribution, an unresolved case or a need for more data. An unresolved result means the evidence did not support positive attribution; it does not certify an extraordinary cause.
This process explains why two witnesses can use the same word while presenting very different investigative value. A detailed, time-stamped instrument record may be analyzable even when the observer never saw a distinct “object.” Conversely, a compelling description with no location, timing or original recording may remain unresolved.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Current AARO publications and dates
AARO’s publication index lists its FY2025 consolidated annual report as released on July 20, 2026. Its UAP Reporting Trends page states a reporting period of January 1, 1996 through August 15, 2026. Those dates identify the coverage of the publications; they do not, by themselves, establish a current case count, resolution percentage or trend in extraordinary events. Aggregate numbers should be taken from the actual report tables rather than inferred from a search-result excerpt.
The dates also matter because terminology, reporting instructions and data systems can change. A historical figure from a FY2023 or earlier report should not be presented as a current total without checking the publication period and definitions used.
Where NASA’s study fits
AARO’s historical record describes the NASA UAP Independent Study Team as active from June 2022 through September 2023. NASA released its report in September 2023. The study emphasized useful data streams and scientific tools for studying UAP; it was not a decision about whether UAP are extraterrestrial.
That distinction is important for readers comparing government and scientific work. A scientific study can recommend better observations, metadata and analytical methods without assigning an origin to every unresolved event. Improving the evidence is a different task from proving a particular explanation.
Common mistakes when using the terms
- Equating UAP with extraterrestrial craft. The acronym describes an unresolved anomaly, not its origin.
- Assuming UAP means only an object in the sky. AARO’s glossary includes seaborne, spaceborne and transmedium detections.
- Sending an operational report to the historical-program form. Military and Department of War civilian personnel should use command or service channels.
- Using the historical form for a general sighting. It is restricted to eligible people with firsthand knowledge of a government program or activity.
- Uploading classified or sensitive details to a web form. Protected information requires an authorized secure process.
- Treating a low-quality clip as a complete record. Compression, missing metadata and unknown camera settings can prevent attribution.
- Quoting old totals as current. Always attach a count to the report’s fiscal year, definitions and publication date.
A practical checklist for documenting an observation
If you are allowed and expected to report an observation through your role’s channel, gather the following without compromising safety or protected information:
- Date and precise time, including time zone or clock source.
- Observer location, altitude and viewing direction.
- Duration and a sequence of apparent movements.
- Weather, visibility, cloud cover, lighting and nearby lights.
- Whether the observation was visual, optical, radar, infrared, RF or a combination.
- Original files and device or sensor metadata.
- Any relevant aircraft, vessel or vehicle identifiers and operational context.
- Names or contact details of additional observers, when policy permits.
- A clear separation between direct observation and later interpretation.
Use the reporting route appropriate to your role. This checklist helps preserve information; it does not create a new public AARO submission channel.
Bottom line: choose the term and channel carefully
Use UFO when discussing the familiar public idea of an unidentified flying object. Use UAP when referring to AARO’s broader, multi-domain category or to current U.S. government terminology. In either case, “unidentified” means that the available evidence has not produced a positive attribution. Military and Department of War civilian personnel should report operational observations through command or service channels, civilian pilots should promptly notify air traffic control, and AARO’s historical-program process is reserved for eligible people with firsthand knowledge of government UAP programs. The strongest investigations begin with preserved originals, reliable timing and location, and enough sensor context to test ordinary explanations before drawing extraordinary conclusions.
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