Martin,
Others have suggested ways of rigging subsurface buoys to allow you to
locate your own site. If, however, your interest is in marking sites so
that others can find them (or perhaps so that they can know to keep away
-- as would apply to a site designated under the UK Protection of Wrecks
Act), I would echo Hauke Schmidt's suggestion that you contact the local
buoyage authorities for advice. I left 25 years ago and so may be far
out of date but I think that the relevant organization in England is
still Trinity House while, for Scotland, it used to be the Commissioners
for Northern Lights (or a group with some such delightfully poetic title).
You might also do well to talk to people who regularly lay oceanographic
moorings, since they face a variety of specialist requirements (such as
keeping the mooring gear clear of delicate instruments) that the
maintainers of navigational buoys do not. Your nearest university
oceanography department could likely advise you for small-scale
moorings. (We used to use second-hand train wheels as sinkers, with a
length of chain attached and then a nylon buoyline but I'm not the
person to advise on the exact specifications.) If that doesn't work, you
could try the base for the Royal Research Ships, which used to be in
Barry, Glamorgan. They are (or were) in the business of preparing
deep-ocean moorings for their ships to deploy on behalf of assorted
oceanographic projects.
Trevor Kenchington
--
Trevor J. Kenchington PhD [log in to unmask]
Gadus Associates, Office(902) 889-9250
R.R.#1, Musquodoboit Harbour, Fax (902) 889-9251
Nova Scotia B0J 2L0, CANADA Home (902) 889-3555
Science Serving the Fisheries
http://home.istar.ca/~gadus
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