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This is Volume 2 of the Ministry of Defence report 'Unidentified Aerial Phenomena in the UK Air Defence Region', Defence Intelligence Staff Scientific and Technical Memorandum 55/2/00, dated February 2000 and received 7 December 2000. It gathers 25 working papers on natural and man-made phenomena, meant as a reference for analysing UAP reports. The papers cover ball lightning, radar detection, balloons, satellites, mirages, plasma and similar subjects. One paper compares magnetic field experiments on human volunteers with close encounter reports. It concludes that effects from such fields are 'uncannily similar' to what witnesses describe.
# UNCLASSIFIED RESTRICTED
Length(m) Diameter(m) Height(m)^{[1]}$
Skyship P600 59 16 20
USA 17 5.5 6.77
USA 39 10 -
USA 25 8 -
USA 67.5 16.7 20.2
COLT 34 12.5 -
UK 30 11 -
GERMANY 68 14 -
TABLE 1 EXAMPLE BALLOON DIMENSIONS
Note [1] Including Gondola Document, cited by the archive. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 258 pages are in the text index: search them above, or from the library's search.