On Mon, 21 Feb 2005 08:06:54 -1000, renewontime dot com
wrote:

We used the "el cheapo" Davis reflectors on drift buoys on the research
ships I've been on.

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Offshore commercial fishing boats also use them to mark their buoys
which is a pretty good recommendation. I have carried a small folding
Davis for years which I assemble and display in foggy conditions,
usually elevated on the end of a boat hook. I've been told that it
shows up well. On the other hand my new 4KW Furuno radar has no
problem picking up small boats of all types at 2 to 4 miles, at least
in flat water conditions.