Maximum effective redshift for different BINGO configurations varying from S/N ≥ 5 to S/N ≥ 15. When comparing the exact solution from sensitivity maps (solid lines) with the fitted power log-normal distribution (dashed lines), we note that they are in agreement with the exact solution in 95% C.L. (shaded regions). The red dashed line shows the maximum redshift of the BINGO HI survey.