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Re: Irradiation and Manual Navigation. Haines and Allen. 1968/9
From: Henry Halboth
Date: 2010 Feb 28, 12:21 -0800

Hi all,

This has been a most interesting series of postings, albeit for the first time in a goodly number of years I have been absolutely unable to open the linked files in any of the messages rec'd - any effort to do so immediately results in a freeze-up, regardless of whose message contains the linked file. I would really like to read the Haines and Allen Report, as my preliminary thought is that we may be talking about some occasional circumstance which can affect sextant observations in like manner to that of abnormal refraction in certain areas of the world or during periods of abnormal atmospherics. Based on only my personal; experience, I find that the matter of irradiation does not have to be taken seriously in practical navigation and any previous references that I have consulted indicate a maximum average induced error to be in the order of 6 arc-seconds.

I would also note with immense glee that, for the time in living memory, Douglas appears to have brought Frank and George to the same side of an issue - will wonders never cease -:)

Regards,

Henry

--- On Sun, 2/28/10, Frank Reed <FrankReed@HistoricalAtlas.com> wrote:

From: Frank Reed <FrankReed@HistoricalAtlas.com>
Subject: [NavList] Re: Irradiation and Manual Navigation. Haines and Allen. 1968/9
To: NavList@fer3.com
Date: Sunday, February 28, 2010, 1:52 AM

Douglas, you wrote:
"There is not enough space on the disk."

Don't panic. That probably means that the disk was full. These crazy inscrutable messages, huh? It's not full now. There's plenty of space. It's possible that you were uploading just before the weekly "garbage collection" run. So try your file again. In general, if you're having any technical trouble, drop me an email at FrankReed[~at~]HistoricalAtlas.com. It's probably something simple that can be fixed in a few minutes or a few hours at most.

As for George's "harumphing", I read your original message and, on the face of it, that's worthy of a harumph or two. I suspect your source was talking about some very different measure of irradiation or maybe there was a misplaced decimal place. Or perhaps seconds of arc instead of minutes or arc??

-FER

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