beam compass


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beam compass

n
(Tools) an instrument for drawing large circles or arcs, consisting of a horizontal beam along which two vertical legs slide. Also called: trammel
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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"If there were ever a place in New York to find such items as an artificial horizon, beam compass, hand cast brass ship bells with iron cast clappers, books, charts, boat-swains' whistles, maps and foghorns, it is New York Nautical," explains Ms.
Draw the template with the beam compass and cut the shape with a jigsaw.