...Locations of captures (or reference points in the movements of trailer-turtles)were determined by triangulation with a Brunton compass, using trees alongfences as known points of reference... 
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...The remainder of the day wasdevoted to obtaining bearings and adding to the triangulation of the manyremarkable summits visible from this part of the country...
A C and F T Gregory 「Journals of Australian Explorations」
...As it was very important that I should obtain a round of bearings beforeproceeding any further, the country having for some days past been tooflat to afford many opportunities for triangulation...
A C and F T Gregory 「Journals of Australian Explorations」
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