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Robert Eno asked:
"What do you do with your  old Nautical Almanacs?"

Sell them on ebay? You can get two or three bucks  for them usually.

And:
"Since the late 1980's, I have been regularly  ordering the US government
edition with its wonderful sewn binding and hardboard  covers (I purchase the
commercial version for my vessel's  library)"

Speaking of which, what does the British printing look like  these days?

And:
"Is there any conceivable use for old Nautical  Almanacs?  Will, say, the
1999 version ever be of use again through some  cyclic mechanism in the universe
(notwithstanding precession etc.)?"

The  "ephemeral" data is just that. Apart from that four year cycle for solar
data,  which is only marginally accurate anyway, everything else is history.
Of course,  the refraction data and dip table, the interpolation tables, the
short sight  reduction tables, and the explanation are all still good, but
that's an excuse  to keep only one copy. That said, I've got four post-1975
Nautical Almanacs at  arm's reach right now (all from ebay, $12 for the lot).

You  concluded:
"Or am I just being an inveterate and sentimental  packrat?"

Yes. 

-FER
42.0N 87.7W, or 41.4N  72.1W.
www.HistoricalAtlas.com/lunars

   

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