Although Steinmetz and others would fix the angle of the compasses at 60 degrees, this is a relatively recent interpretation and is not authoritative.
ANGLE OF THE COMPASSES
INDEX OF PAPERS
The Royal Arch, Its hidden meaning.
George H. Steinmetz. New York : McCoy Publishing and Masonic Supply Company, 1946. 138 pp. Plate 7 following text.
ESSAYS & PAPERS
GRAND LODGE OF BC AND YUKON
of British Columbia and Yukon A.F. & A.M.