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On 30 May 2006 13:16:19 -0400, (Scott Dorsey) wrote:

Even if you don't use strict ORTF, it's still a good idea to use the
ruler and protractor so you know what you _are_ using, you can write it
on the tape box, and you can repeat it in the future if you need to
record that group again in the same hall.

Better yet, a goniometer. It is a device in orthopedics used to
measure the angle of joints. It looks like two wide rulers joined
together, with angle markings on the "hinge" circle.

I suspect there is a hardware store equivalent, thogh I can't remember
ever seeing one.