Spectroscopic redshift completeness as a function of redshift and z⁺⁺ band apparent AB magnitude measured in 3″ diameter circular apertures. The black vertical dotted lines show the redshifts z = 0.25, 1.5, and 2.9, whereas the orange dashed line corresponds to the limiting magnitude z⁺⁺ = 25.9 of COSMOS2015 measured within 3″. Contours correspond to the number of galaxies per bin with photometric redshifts at levels 2, 4, 8, and 16 (from black to white). Beyond z = 1.5, only a few discrete completeness values are computed due to the limited statistics within each bin.