Averaged spectra of ¹²CO J = 1− 0, ¹³CO J = 1− 0, and C¹⁸O J = 1− 0 over the entire M 16. We note that the intensities of ¹³CO J = 1− 0, and C¹⁸O J = 1− 0 are multiplied by a factor of 2 and 5 for clarity, respectively. The green lines represent the Gaussian fitted lines, with the resulting residuals shown below. The black vertical dashed lines mark the different velocity components.