For example the geiger readings. Surely the issue is not whether the readings were 'high' or whether they understood that, but that the readings were high
-er near the indentations in the ground... ...
http://www.ianridpath.com/ufo/halttape.html
The readings do not seem to have been higher at each of the three indentations/ scrapings than at other places.
They were reportedly higher near the middle of the (notional) triangle made by the three markings, and on a nearby tree; the one quantified Geiger counter return on the tape that might apply to one of the indentations was matched by readings elsewhere.
As measured by a Geiger counter that wasn't optimised for detecting low levels of radiation, used by someone who mangled the readings.
From the same source as above (Ian Ridpath's transcript)-
bold = things I think are particularly relevant to this point,
[italics] my comments:
External Quote:
HALT: Where are the impressions? Is that all the bigger they are?
ENGLUND: Well, there's one more well-defined over here.
SECURITY COMMUNICATION: Sergeant Bustinza – Security Control.
HALT: We're still getting clicks. [Not "more clicks", no indication of any increase from any earlier readings]
NEVELS: ...getting clicks...
SECURITY COMMUNICATION (includes 'Sergeant Bustinza... We're outta gas...Security-6 boarding...East Gate').
HALT: Can you read that on the scale?
NEVELS: Yes, sir. We're now on the five-tenths scale, and we're reading about third, fourth make [? – perhaps he meant to say 'mark'] over... [This might mean 0.03-0.04 milliroentgens/hour; see below. It might refer to the 1st mark/ depression checked, as the next reading on the tape appears to be for what is referred to as "the second pod indentation"]
HALT: OK, we're still comfortably safe here.
RADIO COMMUNICATION (BUSTINZA?): Do you happen to have a Light-all?
GARBLED SECURITY COMMUNICATION (Includes: 'East Gate security... Security Six... have a light-all with gas...please.')
HALT: Still minor readings, the second pod indentation... [The markings, suspected by a local police officer as perhaps animal-made scrapes, are now being described by Col. Halt as "pod indentations"]
BACKGROUND SECURITY COMMUNICATION.
NEVELS: Nope.
HALT: This one's dead. Let's go over to the third one over here. ["Nope", "dead" Might Imply there wasn't a raised level at the 2nd mark. No values recorded]
[The "dead" comment has also been interpreted as referring to a light-all, but as there's no other discussion of the 2nd ground mark, or any mention of a Geiger counter reading for it, I think it might be that which is being talked about. "This one... Let's go over to the third one"]
BACKGROUND SECURITY COMMUNICATION: Sergeant Bustinza...
NEVELS: Yes, now I'm getting some residual. [A higher reading than at the "dead" second mark?]
HALT: I can read it now. The meter's definitely giving a little pulse. [No-one states any numbers, but this implies that the reading was higher than at the second mark].
ENGLUND: ... about the centre ...
HALT: I was gonna say let's go to the centre of the area next and see what kind of a reading we get out there. You're reading the clicks, I can't hear the clicks. That about the centre, Bruce?
ENGLUND: Yes.
HALT: OK, let's go to the centre.
NEVELS: Yes, I'm getting more...
HALT: That's the best deflection of the needle I've seen yet. OK, can you give me an estimation. We're on the point five scale...we're getting...have trouble reading... [So according to Halt the highest reading so far is between the marks, not at the marks].
ENGLUND: At approximately 01.25 hours...
NEVELS: We're getting right at a half of a millirem. [More likely 0.05 milliroentgens/hour (mR/h): The AN/PDR-27 meter displays milliroentgens/hour. Roentgens and REMs (Roentgen Equivalent Man) are not quite the same.]
Colonel Halt's memo dated 13 January 1981 to the UK MoD (Wikipedia,
https://en.wikipedia.org/wiki/Rendlesham_Forest_incident#/media/File:Halt_Memorandum.jpg) states that the peak reading was 0.1 milliroentgens (again, he should have said milliroentgens/hour) not the 0.5 apparently stated by Nevels, but 0.1 isn't evidenced on his tape either.
The memo continues
External Quote:
...with peak readings in the three depressions and near the center of the triangle formed by the depressions...
...but the tape transcript (above) does not support this statement about the marks/ depressions. Halt also says
External Quote:
A nearby tree had moderate (0.05–0.07) readings on the side of the tree toward the depressions.
0.07 is higher than the readings at the marks/depressions if we're using the tape as evidence, which is presumably what Halt was using it for, to avoid having to write notes in the dark.
"The best deflection of the needle" Halt has seen up to this point of the transcript seems to be 0.05 mR/h in the middle of the "landing area", not at any of the marks.
________________________________________________________________________________________________________________________________________________________
Ian Ridpath's Rendlesham Forest UFO case website presents evidence, from the AN/PDR-27's manufacturer, that the readings reported by Halt were of little significance, and that the AN/PDR-27 wouldn't be an optimal device for measuring background/ very low levels of radiation
http://www.ianridpath.com/ufo/rendlesham4.html. Another UFO researcher, familiar with AN/PDR-27, came to a similar conclusion (see below).
But if we assume the AN/PDR-27 readings were broadly accurate, the tape transcript appears to tell us this
(admittedly it requires some interpretation, which I might have got wrong):
The 1st mark gave a reading of 0.03-0.04 mR/h.
The 2nd mark was "dead", no values were recorded on tape.
The 3rd mark "I'm getting some residual" (Nevels), "The meter's definitely giving a little pulse" (Halt), no values recorded.
The first recorded reading of 0.05 mR/h was from a point between the marks, not at the marks themselves, and was "the best deflection of the needle" Col. Halt had seen up to that point.
Nevels misreports the numbers (by a magnitude) and uses the wrong name for the units of measurement (Halt's memo indicates that he was aware of this, no reference to "half a millirem"). Tim Printy, editor of UFO investigation magazine
SUNlite2 (6), Nov-Dec 2010 (
PDF attached below, pg. 10 "The AN/PDR-27") noticed this too:
External Quote:
The comments on the tape demonstrate that Nevels did not quite understand the device or was unfamiliar with it. Is he actually describing the audible signal or is he referring to each tick on the meter as a "click"? His reading of the meter as "seven-tenths" also speaks volumes. A proficient operator would have announced the reading as 0.07 mrem or mroentgens/hour.
Tim Printy is familiar with the AN/PDR-27; his article on its use by Halt/ Nevels in
SUNlite 2 (6) starts
External Quote:
My experience in the US Navy's nuclear propulsion program exposed to me the use and maintenance of various radiation detectors. One of those happened to be the AN/PDR-27 that was used in Rendlesham that night. As a result, I feel I can act as something of an expert on this part of the Rendlesham case. First of all, the choice to use the AN/PDR-27 was not a very good one.
Interestingly, Printy says (I've no idea if it is accurate)
External Quote:
Colonel Halt claimed on a Strange but true program that only the center of the "triangle" was "hot" and the rest of the forest was "cold".
Printy points out that on the tape Halt finds radiation in multiple places. -I think this is interesting because if Halt did say this on
Strange But True, it supports the interpretation that the ground markings were
not significant "hotspots" (which I think is in line with the evidence on the tape, but at odds with Halt's 13th January 1981 memo to the MoD).
________________________________________________________________________________________________________________________________________________________
Meanwhile, back in Rendlesham Forest or thereabouts, 1980:
External Quote:
HALT: ...best point. I don't seen it go any higher.
VOICE (BALL?): It's still flying around.
HALT: OK, we'll go out toward the...
NEVELS: Now it's picking up.
HALT: This is out toward the number one indentation where we first got the strongest reading. Yeah, it's similar to what we got in the centre. [The tape appears to indicate that the "number one indentation" had a reading of 0.03-0.04 mR/h, the strongest reading was a small area in the middle of the "triangle" described by the marks, 0.05 mR/h.]
NEVELS: ...right in the pod, it's right near the centre. [Nevels adopts Halt's term, "pod", for something they haven't seen]
ENGLUND: This looks like an area here possibly that could be a blast...it's in the centre of the triangle... [Could be a blast? They've just noticed it? Remember, this is in the middle of three scrapes in the ground in a triangular arrangement, each side approx. 2.5 metres/ 8ft 2 inches long (Vince Thurkettle, sketch on Ian Ridpath's site), where Halt and co. have been taking Geiger counter readings.
Some accounts (which I feel are unreliable) claim there have been men there since early morning on the 26th December. The site was visited by local police, who saw the scrapes/ marks, but missed the blast area in the middle. Nevels and Halt have checked the centre of the triangle with a Geiger counter- but didn't notice a blast area until Englund mentions it.
If anyone present took this seriously, their subsequent actions are hard to understand: An unexplained blast area near US airbases. Do they immediately contact the British authorities? No. Does Halt arrange for photographers, perhaps EOD specialists (if the bases had them) to discretely revisit the site in daylight? Not that we know of.]
[In passing, they believe they've detected abnormally high radiation readings- and they don't do anything serious about that, either.]
HALT: It's hard to tell... Here take this, my fingers [are] about to freeze.
ENGLUND: ...up towards seven...Just jumped up towards seven tenths. [Higher than the readings for the ground markings]
HALT: Seven tenths? Right there in the centre?
ENGLUND: Uh huh.
[Ian's note: this is the second time they have checked the centre; no 'jump' in the readings was mentioned the first time.]
HALT: We found a small blast – what looks like a blasted or scruffed-up area here. We're getting very positive readings. Let's see, is that near the centre?
ENGLUND: Yes, it is. This is what we would assume would be the dead centre. [This seems strange to me, remembering the tiny area of forest floor in question- perhaps less than 4 square metres- how would the centre not be fairly obvious? Are the indentations that difficult to see?]
NEVELS: Picking up more as you go along – the whole area here now...
A FEW CLICKS ARE AUDIBLE.
HALT: Up to seven tenths? Or seven units, let's call it, on the point five scale. OK, why don't we do this: why don't we make a sweep – here, I've got my gloves on now – let's make a sweep out around the whole area about ten foot out, make a perimeter run around it, starting right back here at the corner, back at the same first corner where we came in, let's go right back here. I'm gonna have to depend on you counting the clicks. [Halt doesn't seem to know what units of measurement the Geiger counter uses. Maybe he did some checking before writing his memo, which is fair enough]
NEVELS: Right.
HALT: OK, let's...
NEVELS: I'll tell you as it gets louder...
HALT: ...then I can put the light on it and sweep around it.
VOICE: (Unintelligible)
HALT: Put it on the ground every once in a while.
ENGLUND: This looks like an abrasion on the tree... [the sight of marks on the trees, facing into the small clearing with the scrapings, seems to be evidence supporting the blast theory. Englund refers to the site being a "landing site" and a "landing area". We know that they were in a managed forest where the forestry workers would use axe-marks to identify trees for felling; the airmen probably didn't know that.]
________________________________________________________________________________________________________________________________________________________
The guys continue to get readings between 0.01 and 0.04 mR/h as they do a sweep around the area. Using a device whose manufacturers have said is not appropriate for low-level/ background radiation detection.
Even if the AN/PDR-27 was giving dependable readings, I don't think the tape supports the idea that the 3 ground markings had higher radiation levels than the surroundings.
The group started with three nondescript ground marks, each approx. 7 inches/ 18cm across and 1.5 inches/ 3.8 deep, and they've discovered a radioactive scene and a blast area caused by a "pod" using the forest as a landing site.
And don't follow it up the next day.
I do wonder about the Starlight Scope; it has mildly radioactive components. Englund states it detects heat, it doesn't; perhaps he is unaware of its other characteristics. Halt, also apparently not aware that the scope is an image intensifier using visible spectrum light, opines that it is showing "Heat or some other form of energy" when they view a bright patch on a tree.
Coincidental fact about Orford Ness, the spit where the lighthouse (and Cobra Mist) were sited- almost certainly with no connection to any of this-
External Quote:
The Atomic Weapons Research Establishment had a base on the site, used for environmental testing, i.e. testing conducted to determine the functional performance of a component or system under conditions that simulate the real environment in which the component or system is expected to operate.
Wikipedia, Orford Ness
https://en.wikipedia.org/wiki/Orford_Ness