# December 11, 1955 — nr. Jacksonville, FL — Radar-Visual Intercept Attempt

**URL:** https://uapdiscovery.discourse.group/t/december-11-1955-nr-jacksonville-fl-radar-visual-intercept-attempt/426
**Category:** Blue Book Unknowns
**Created:** [December 11, 2025, 12:03am UTC](https://uapdiscovery.discourse.group/t/december-11-1955-nr-jacksonville-fl-radar-visual-intercept-attempt/426 "2025-12-11T00:03:48Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![jeffknox](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jeffknox](https://uapdiscovery.discourse.group/u/jeffknox)
#### Post date: [December 11, 2025, 12:03am UTC](https://uapdiscovery.discourse.group/t/december-11-1955-nr-jacksonville-fl-radar-visual-intercept-attempt/426/1 "2025-12-11T00:03:48Z")

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![GefoLsHaEAAQfqi](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/2/2e44f6bf631bb8a98aec2e0410ea434769fef439.jpeg)

December 11, 1955 — nr. Jacksonville, FL  
9:00 p.m. Near Jacksonville, Florida, two airline pilots and ground observers see a fast-maneuvering, orange-red, round object, with ground radar tracking. Two USN jets on a practice night-flying mission are vectored to the object by a Naval Air Station Jacksonville controller. On approach the object suddenly rises up to 30,000 feet then dives back down in a circle, buzzing the jets. [Eberhart]

Sources:  
Brad Sparks, Blue Books Unknowns Catalogue, Case 1163, p. 232;

 ![12111955-JacksonvilleFL-Sparks-Case1163-p232](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/3/39839305d791735257d892f926d1b73c3f880e3d.png)

Richard Hall, The UFO Evidence, p. 32;

 ![12111955-JacksonvilleFL-UFOEv-p32](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/5/5d9105ae55bf0afbfd6a9b978b64c48b5bae90a0.jpeg)

Loren E. Gross, UFOs: A History, 1955, September 16th–December 31st, The Author, 1993, p. 110;

 ![12111955-JacksonvilleFL-Gross-p110](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/2/2178ba7b7078582312994714fca208dd37bfc778.png)

Richard F. Haines, “Aviation Safety in America - A Previously Neglected Factor,” NARCAP Technical Report 01-2000, October 15, 2000, p. 48;

 ![12111955-JacksonvilleFL-NARCAPTR1-p48](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/5/51d94d03350cfa0acc2de466490e7bfed8ab5a59.png)

Dominique F. Weinstein, ‘Unidentified Aerial Phenomena - Eighty Years of Pilot Sightings: A Catalog of Military, Airliner, and Private Pilots sightings from 1916 to 2000’, NARCAP TR-04, 2001, p. 31;

![12111955-JacksonvilleFL-Weinstein-p31](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/optimized/2X/d/d632da32a34e16eb0bab544190384f634473cdd8_2_690x24.png)