Canada’s Longest and Deepest Caves
Canadian Protractor
In-Cave Sketching With a Protractor
An Illustrated Guide Dan Green 2020
The protractor allows precise plotting of survey stations to help make scaled sketches of
the cave. These guidelines are concepts, not rules, to show the basic steps.
The page content here - including an image of the protractor which can be printed on heavy-
weight transparent plastic - is available as a PDF file here
