For three hours on the night of 14 September 1958, military radar operators at Wheelus Air Base near Tripoli reported returns they could not identify. Searches from the ground and an aircraft did not produce a definite visual sighting. The surviving USAF file is valuable because it preserves both the initial operational description and a later assessment that warns how little could safely be reconstructed from it.
The original three-page file reproduced by NICAP contains a Project 10073 record card, a message from the commander of the 7272nd Air Base Wing dated 19 September, and an evaluation dated 21 October 1958. These are contemporary military records. Their existence establishes that the radar report was investigated; it does not establish that a solid craft made the returns.
What the radar operators reported
The reporting window was 18:00–21:00 GMT on 14 September. The message distinguishes the ground-controlled approach station, abbreviated GCA, from the ground-controlled interception station, GCI. The returns were described as comparable in apparent size and intensity on the scope to aircraft returns. That is a comparison of displayed radar signals, rather than a measurement of an object’s physical dimensions.
The GCA account places one return about a mile and a half away at a reported height of 400 feet. It says a return entered the precision-approach display from the north, crossed back and forth, sometimes left the display, and also appeared in different directions on the area-surveillance scope. These statements describe what operators interpreted on their instruments. They do not supply a surviving plot from which a reader can reconstruct every movement.
GCI reported a return initially about 30 miles northeast of its station, at a reported altitude of 700 feet. It was tracked towards the coast and then south, before being lost in ground clutter near the approach to runway 29. The message gives a broader reported height range of 200–1,000 feet and speeds of 25–60 knots. It should not be assumed that each number belongs to one continuously identified physical target.
Two systems and an incomplete timeline
The equipment is identified in the message: MPN-11C approach radar at GCA, with a search radar and MPS-14 height-finding radar at GCI. The reproduction of the search-radar designation is less clear than the height-finder entry, so it is not expanded here. The significant point is that the file describes reports from two operational functions and different displays, not a single civilian observer guessing a height.
However, separate radar reports are not automatically simultaneous corroboration. In the October evaluation, Colonel Gordon C. Hoffman specifically complained that the information did not make clear whether the GCA and GCI returns happened together or which came first. Without that sequence, it is difficult to decide whether the stations were seeing the same thing, separate targets or different effects.
The record card compresses the episode into one object, a southerly course and a three-hour duration. The longer message contains changes of direction and appearances across different parts of the scope. Those two levels of description belong together. The card is a filing summary and should not be read as if it were a complete three-hour track, with continuous identification maintained throughout.
The attempted visual checks
The record card says efforts were made to observe from both the ground and the air, but no object was definitely seen. It describes an unsuccessful attempt involving an F-86 within a mile of a radar indication. This supplies an attempted check on the instrumental report, with a negative result. It does not document a pilot seeing an unusual vehicle at close range.
That distinction also limits the descriptive tags appropriate to the case. The record supports a radar report. It does not support a disc, triangle, cylinder, luminous sphere, occupants, a landing or non-human contact. Nor does the coastal location make it an underwater-object encounter: no entry into or emergence from water is described in the reviewed file.
Weather and the USAF assessment
Scattered cloud at night is recorded in the message, alongside wind observations. The record card additionally mentions showers moving southwest. These entries make weather relevant to the inquiry, but they are not a demonstrated reconstruction of a particular propagation effect. A general weather description cannot by itself show which radar indications it caused.
Hoffman’s 21 October evaluation says the sparse description permitted possibilities ranging from an aircraft or balloon to false targets and weather effects. He regarded weather phenomena or equipment malfunction as likely, given the limited information and lack of a definite visual observation. His conclusion was a qualified assessment from an incomplete report, rather than a documented repair finding or an identified weather echo matched to each return.
The record card marks its general “Other” conclusion and repeats weather or equipment problems as possible causes. Neither an archive label of “unknown” in a later catalogue nor the mere use of “unidentified” in the original operational message should override that actual assessment. Equally, the assessment’s probability wording should not be upgraded to proof of a specific malfunction.
Assessment and map location
Outcome: Possibly Explained. The contemporary USAF evaluation favoured weather effects or equipment malfunction, while explicitly noting serious gaps in the report. No definite visual object was established. The proposed conventional causes remain plausible assessments rather than a demonstrated identification of every radar return. This classification preserves the documented explanation and its limits.
Map location: the pin at 32.87, 13.28 is an approximate Wheelus GCA-station reference, rounded from the message’s observer position of 32°52′ N, 13°17′ E. It is not a target position, a plotted flight path, an aircraft interception point or a visitor entrance. The GCI position in the same message is different. The historical military setting is not presented as a currently accessible attraction.
This case concerns the Wheelus radar episode of 14 September 1958. It is separate from the Libya aircrew report of 4 January 1958. The image above reproduces the evaluation document itself; there is no photograph of an aerial object in this reviewed file. Source and metadata review: 13 November 2026.