Fallrapport: Navy-klippet GoFast — hastighet och vind

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UNCLASSIFIED 
UNCLASSIFIED 
All-domain Anomaly Resolution Office 
U.S. Department of Defense 
Case: “Go Fast” 
Case Resolution | February 6, 2025 
Case Overview 
In January 2015, a U.S. Navy F/A-18F pilot 
recorded an object using a Forward Looking 
Infrared (FLIR) sensor about 13,000 feet 
above the Atlantic Ocean off the coast of 
Florida. 
The video appeared to show the object moving 
at high speed. AARO cannot definitively 
identify the object, but it displayed no 
anomalous performance characteristics. 
The Department of Defense officially released 
the “Go Fast” video in 2020. It is available 
for public viewing at the Navy’s FOIA 
Reading Room. 
Key Findings 
AARO assesses with high confidence that the 
object did not move at anomalous speeds. 
AARO's analysis showed: 
•The object’s altitude was
approximately 13,000 feet.
•The object’s speed ranged from about
32 m/s (72 mph) to 72 m/s (161 mph)
depending on its heading relative to
the wind. Compensating for the
wind’s contribution to the object’s
speed, its approximate speed range is 2
m/s (5 mph) to 41.3 m/s (92 mph).
•The object’s heading deviated as much as 32° from wind direction, though most
simulations conducted during AARO’s analysis showed significantly less difference.
The object did not move against the wind in any simulation.
Case Essentials 
Location: Eastern coast of Florida 
Date: January 2015 
Object Altitude (reported): Near ocean’s 
surface 
Object Altitude (assessed): 13,000 feet 
Object Speed (reported): Appeared to 
move at high speeds 
Object Speed (assessed): 5 mph - 92 mph 
Object Shape (reported): Round 
Object Shape (assessed): Spherical or 
oblate ellipsoid 
Reporter: U.S. Navy 
Sensor: Forward Looking Infrared 
Reported Behavior: Moved at high speeds 
near the ocean’s surface 
Assessed Behavior: An object moving 
between 5 and 92 mph at approximately 
13,000 feet 
Summary of Findings: High confidence 
the object did not demonstrate anomalous 
performance characteristics 

UNCLASSIFIED 
 
2 
UNCLASSIFIED 
 
Determining the object’s true speed and direction of travel (heading) requires knowing the F/A-
18F’s heading. AARO calculated the object’s speed and heading relative to the aircraft because 
the video display does not contain the aircraft’s heading. AARO calculated the object’s position 
and direction of travel for the entire range of possible wind directions (0° - 360°) to account for 
differences in atmospheric conditions between the F/A-18F’s altitude and object’s altitude. This 
comprehensive modeling informed AARO’s assessment of whether the object moved with or 
against the wind and whether it behaved anomalously for all possible directions of travel. 
AARO factored in historical wind speeds and directions at both the object’s altitude (13,000 feet) 
and the aircraft’s altitude (25,000 feet), as measured near the time and location of the event: 
• At 13,000 feet, wind speed was 30.9 m/s (69 mph) from the west (265°). 
• At 25,000 feet, wind speed was 52 m/s (116 mph) from the west southwest (255°). 
Figure 1 shows the object’s range of possible speeds calculated while compensating for wind 
speed at 13,000 feet. This is considered the “intrinsic” speed. An intrinsic speed of 0 m/s 
indicates that the object is moving with the wind, or about 30.9 m/s. 
 
 
Figure 1: The y-axis represents the object’s speed with wind effects removed. The x-axis represents the 
wind’s heading relative to the F/A-18F’s airframe geometry (0° is a headwind). The curv