Unidentified Aircraft Sighting off Holland Coast
Document coverPage 1 of 341_110448_Records_Relating_to_the_Collection_and_Dissemination_of_Intelligence_1948-1955-TS_CONT_No.2_2-5300-2-5399 · View original on war.gov
Three crews of the 307th Bomb Group observed an unidentified jet-propelled aircraft at 30,000 feet off the west coast of Holland on 5 September 1948, which exhibited unusual acceleration and climb capabilities suggesting rocket assistance.
“Unidentified aircraft was sighted by three crews of the group at 1402Z 5 Sep 48 off west coast of Holland, 5155N/0355E. Altitude of all aircraft was 30,000 feet. When first sighted the unidentified A/C was cruising at a normal jet speed, heading 120 degrees. Soon after first seen, A/C began leaving smoke trails and condensation trails accompanied by sudden acceleration and then climb.”
Verbatim from 341_110448_Records_Relating_to_the_Collection_and_Dissemination_of_Intelligence_1948-1955-TS_CONT_No.2_2-5300-2-5399 · View original on war.gov
Case details
- Date
- 1948-09-05
- Precision
- day
- Location
- off west coast of Holland, 5155N/0355E
- Country
- Netherlands
- Branch
- USAF
- Unit
- 307th Bomb Group
- Sensors
- eyewitness
- Altitude
- 30000 ft
Resolution
Evaluated as B-2 (likely foreign jet aircraft with rocket assist capability)
Source document
Agency: DEPARTMENT OF WAR
File: 341_110448_Records_Relating_to_the_Collection_and_Dissemination_of_Intelligence_1948-1955-TS_CONT_No.2_2-5300-2-5399
Case ID: 1948-USAF-434212
View original on war.gov →Extracted via LLM. Verbatim excerpt validated.