object
Reflecting circle
A named full-circle reflecting instrument for repeating lunar and angular measures at sea. Not a published sextant alone, not an octant, and not a theodolite.
Also known as Borda circle · Repeating reflecting circle
object
A named full-circle reflecting instrument for repeating lunar and angular measures at sea. Not a published sextant alone, not an octant, and not a theodolite.
Also known as Borda circle · Repeating reflecting circle