The Shetland Attack Pony is the first combined electronic compass and clino designed specifically for use underground. Field trials have shown that it will give a loop closure of better than 1%, slightly better than that provided by standard instruments.
SAP - Shetland Attack Pony
The Shetland Attack Pony is a new instrument for cave surveying. No more squinting through misted-up lenses, no more struggling to avoid steeply inclined legs and hunting for decent plumb points.
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