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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.
“Lockheed”1 page
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# UNCLASSIFIED NATO RESTRICTED flights. Special approval is required for other (non-NATO) nations, who must not fly below 2000ft AGL. Exceptionally UK light fixed wing aircraft may fly down to 50ft. ## VISIBILITY FOR LOW FLYING 15. Strict rules apply to visibility for low flying. This is of interest in the UAP context, as clearly this filters out all manned aircraft if certain conditions exist: For low flying aircraft (in excess of 140kts), there must be a forward visibility of at least 5km and 150ft horizontal and 500ft vertical separation from cloud. - Light aircraft must have a forward visibility of at least 2km, be clear of cloud and sight of the surface - Helicopters, (flying at 140kts, or less) must either be clear of cloud and in sight of the surface, or apply the same rules as for low flying aircraft above. ## AIRCRAFT LOW FLYING AT NIGHT 16. The UK Night Low Flying System (UKNLFS) is a source of potential UAP erroneous reports. Restrictions apply as shown at Table 1, with timing that can be taken into account for UAP event analysis. Normally, low flying night flights will show navigation lights. ## AIRCRAFT IN FORMATIONS 17. In the UK Low Flying System a formation is not normally to exceed four aircraft, but North of 54 degrees North formations of up to 8 aircraft may be flown permitted for various operational activities. Special permission is required to exceed these rules and the incidence of larger formations is very rare. ## SPEED WHEN LOW-FLYING 18. The maximum speed (all aircraft types) is 520kts. ## USE OF RE-HEAT OR AFTERBURNER 19. A characteristic of some UAP reports is that of glowing objects in the sky. Except for emergencies, it is unlikely that after-burners will be used overland at low altitude at less than 1000ft for most aircraft. The Jaguar is an exception (500ft) ## FREE-FALL PARACHUTING 20. A brief glimpse of a parachute can be sufficient to produce a UAP report. Manned aircraft are prohibited from the designated parachuting areas. Normally, parachuting only takes place in daylight. ## OBSTRUCTIONS & POWER LINES 21. During analysis it should be noted that while a UAP (e.g. Ball Lightning) may be observed near to tall structures, aircraft, the crews of which will be aware of these, can be eliminated, as they will not fly close by. UK towers below a height of 500ft are not lit. Slow inspection aircraft can be expected in the vicinity of electrical power lines. ## PROHIBITED & AVOIDANCE AREAS 22. For the purpose of evaluation of UAP reports it is possible to filter out fixed wing aircraft (not withstanding any infringement), where sufficient UAP evidence exists to determine that its altitude was observed below the avoidance area minimum altitude (2000ft AGL)
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