The Five Observables: Understanding the UAPTF Framework for Classifying UAP

In June 2021, the Office of the Director of National Intelligence (ODNI) released its Preliminary Assessment on Unidentified Aerial Phenomena — the first official U.S. government report to acknowledge that UAP represent a genuine national security concern. Buried within that nine-page document was a classification framework that has since become the standard analytical lens for serious UAP research: the Five Observables.

These five characteristics describe physics-defying behaviors that, if genuine, represent technology far beyond any known human capability. They are the criteria used by the UAP Task Force (UAPTF), its successor AARO, and now by AUSPEX to tag and analyze incidents computationally.

Definition: The object appears to hover or maintain altitude without any visible means of propulsion — no wings, rotors, exhaust plumes, or lift surfaces.

The most commonly reported observable. Witnesses describe objects that hang motionless in the air, sometimes for extended periods, without any visible mechanism for generating lift. This directly contradicts our understanding of aerodynamics: every known aircraft requires either aerodynamic lift (wings), thrust vectoring (jets/rockets), or displacement (lighter-than-air).

Key cases in the AUSPEX corpus:

• ◆The Tic Tac encounter (2004) — Commander David Fravor described a white capsule-shaped object hovering over a churning ocean disturbance, with no visible propulsion, wings, or exhaust
• ◆Rendlesham Forest (1980) — USAF personnel observed a triangular craft hovering silently among the trees at RAF Woodbridge
• ◆Lonnie Zamora / Socorro (1964) — New Mexico police officer observed an egg-shaped craft hovering near the ground before accelerating away

Definition: The object transitions from stationary hover to extreme velocity, or executes sharp directional changes, at rates that would produce G-forces lethal to any known biological or structural system.

This is the observable that most directly challenges physics as we understand it. Human pilots lose consciousness around 9G. The F-22 Raptor — the most maneuverable fighter jet in existence — is structurally limited to approximately 9.5G. Multiple UAP incidents describe objects executing maneuvers that would require hundreds or thousands of Gs.

The physics problem: To accelerate a 1-ton object from 0 to Mach 5 in one second requires approximately 170,000 Gs of force. Either these objects have zero inertial mass, or they are manipulating spacetime itself.

Key cases:

• ◆USS Princeton radar tracks (2004) — radar operators tracked the Tic Tac dropping from 80,000 feet to sea level in less than 0.78 seconds
• ◆Gorman Dogfight (1948) — North Dakota National Guard pilot George Gorman pursued a luminous object that outmaneuvered his P-51 Mustang with impossible right-angle turns
• ◆Nash-Fortenberry (1952) — Pan American pilots watched six glowing discs execute a simultaneous 150-degree reversal at high speed

Definition: The object travels at speeds exceeding Mach 5 without producing a sonic boom, visible exhaust, plasma sheath, or thermal signature.

Any object traveling through Earth's atmosphere above Mach 1 creates a shock wave that produces a sonic boom. Above Mach 5, atmospheric friction creates a plasma sheath around the vehicle — this is why reentry vehicles glow. UAP have been tracked on radar at hypersonic speeds with no sonic boom heard at ground level and no thermal signature detected on infrared sensors.

The physics problem: This implies either the object is not physically interacting with the atmosphere (some form of field propulsion or warp effect that moves space around the object rather than the object through space), or our understanding of high-speed aerodynamics is incomplete.

Key cases:

• ◆Canadian Forces radar (1968) — DEW Line stations tracked an object at over 6,000 mph with no sonic boom
• ◆Chilean Navy CEFAA video (2014) — military helicopter FLIR camera tracked an object traveling at extreme speed with no infrared heat signature
• ◆AARO pilot report cluster (2021) — multiple military pilots reported objects exceeding known aircraft performance envelopes in restricted airspace

Definition: The object is visually confirmed but produces no radar return, or appears on radar but is invisible to optical observation. Some objects appear to selectively modulate their observability.

This observable describes a mismatch between sensor modalities. A conventional aircraft that is visible to the naked eye will also appear on radar (and vice versa, with some exceptions for stealth technology). UAP frequently demonstrate the ability to be visible on one sensor while invisible to another — or to appear and disappear from all sensors simultaneously.

What makes this different from stealth: Human stealth technology (F-22, B-2, F-35) reduces radar cross-section but does not eliminate it. These aircraft are still visible to radar at close range, and they are always visible optically and thermally. UAP low observability appears to be total across multiple sensor bands simultaneously.

Key cases:

• ◆Tic Tac (2004) — initially appeared on the SPY-1 radar of the USS Princeton, then disappeared and reappeared at the pilot's CAP point 60 miles away — a location known only to the carrier group
• ◆Kinross disappearance (1953) — F-89C Scorpion interceptor's radar return merged with the UAP return, then both vanished from radar entirely
• ◆Hessdalen Lights (1981–present) — luminous phenomena in Norway's Hessdalen valley have been scientifically instrumented and show anomalous radar and spectral characteristics

Definition: The object transitions between air, water, and/or space without any observable change in performance, structural modification, or phase transition.

No known human vehicle can operate in more than one medium without significant compromise. Submarines cannot fly. Aircraft cannot submerge. The engineering constraints of each medium (aerodynamics vs. hydrodynamics vs. vacuum) are fundamentally different. UAP have been observed entering and exiting water at speed, with no splash, no cavitation, and no deceleration.

Key cases:

• ◆USS Omaha (2019) — Navy personnel filmed a spherical object descending toward the ocean surface and entering the water without slowing down. Submarine search found no wreckage.
• ◆Operation Prato / Colares (1977) — Brazilian Air Force documented objects descending from the sky into the Amazon river basin, with some emerging from the water
• ◆NATO North Atlantic incursion (2023) — reports of objects transitioning between air and water near undersea infrastructure in the North Atlantic

AUSPEX computationally tags every incident in our corpus with the observables that apply. We use two methods:

Regex-based extraction: For each observable, we maintain a pattern library that scans incident descriptions for characteristic language. For example, the ANTI_GRAVITY pattern matches terms like "hovering," "no propulsion," "stationary," "suspended," and "defied gravity."

Manual expert tagging: For the 75 verified incidents in our core corpus, each has been manually reviewed and tagged.

This tagging enables several analytical capabilities:

• ◆Observable co-occurrence matrix — which observables appear together most frequently
• ◆Observable frequency by decade — tracking how the distribution of observables shifts over time
• ◆Multi-observable filtering — analysts can find all incidents exhibiting, say, both INSTANT_ACCEL and TRANSMEDIUM simultaneously
• ◆Credibility weighting — incidents exhibiting 3 or more observables are statistically less likely to be misidentifications

The Five Observables framework transforms UAP research from anecdotal storytelling into structured, queryable data analysis. It is the foundation of serious investigation.

Government and intelligence-community context:

• ◆Luis Elizondo, Imminent: Inside the Pentagon's Hunt for UFOs (William Morrow / HarperCollins, 2024) — by AATIP's former director — Bookshop · Amazon
• ◆Leslie Kean, UFOs: Generals, Pilots, and Government Officials Go on the Record (Harmony Books, 2010) — the foundational on-the-record civilian-aviation and military testimony book — Bookshop · Amazon
• ◆Ross Coulthart, In Plain Sight: An investigation into UFOs and impossible science (HarperCollins, 2021) — the most rigorous mass-market post-AATIP book — Bookshop · Amazon
• ◆Garrett M. Graff, UFO: The Inside Story of the US Government's Search for Alien Life Here—and Out There (Avid Reader Press, 2023) — Bookshop · Amazon

Material analysis and the science side:

• ◆Jacques Vallée and Paola Harris, Trinity: The Best-Kept Secret (Starworks USA, 2021) — material-recovery case from 1945 New Mexico, with chain-of-custody — Bookshop · Amazon

Primary sources (free):

• ◆ODNI — Preliminary Assessment: Unidentified Aerial Phenomena (June 2021) — the report that formalized the Five Observables framing
• ◆DoD AARO — Historical Record Report Vol I (March 2024)
• ◆Congress.gov — UAP hearings (2023)

Affiliate disclosure. Some of the book links in this post are affiliate links — primarily through Bookshop.org (which supports independent bookstores), with Amazon as a secondary fallback. As an Amazon Associate, AUSPEX earns from qualifying purchases. If you make a qualifying purchase via these links, AUSPEX may earn a small commission at no additional cost to you. The site does not host or reproduce any copyrighted text from any of the works mentioned; quotations above are brief and used for commentary purposes under fair use.

This analysis uses data from the AUSPEX incident corpus. All statistical claims are derived from publicly available government reports and civilian databases.