Cave-Surveying digest, Vol 1 #80 - 5 msgs

[Martin Ellis]

> May I ask what are cairns?

Small piles of rocks

> I like the drilled holes method better.. Then after the survey is
completed the holes themselves can be grouted with crushed rock and they
will not be visible any >more.

But the idea of permanently marked stations is so that in the future,
possibly decades later, other surveyors can tie into your survey. Removing
them after you have finished your survey would mean this can't be done.
Only a few are needed - I would suggest at the entrance and perhaps one
every 500m or 1 km of passage.  The details (locations, description,
co-ordinates) of these permanent stations need to be published in a fairly
widely distributed caving journal.

Martin Ellis

Somerset
UK