(19) Baudin's journal tells us that the determinations were by a number of sextuple azimuths, or octuple azimuths, and/or by ortive and occiduous azimuths or amplitudes.
It is an ortive azimuth when the celestial body is rising (in the east), and an occiduous (or occasive) azimuth when the celestial body is setting (in the west).