By the mid-eighteenth century such levels were attached to various instruments, including Hadley's octant, or used with them as a matter of routine.
Kumbindi wenkulungwane yeshumi elinesibhozo ezo zichazi butyaba zazifakwa kwizixhobo ngezixhobo eziquka ioktanti kaHadley, okanye zisetyenziswa nazo njengomsebenzi wemihla ngemihla.