Fraction of spectroscopically confirmed cluster members that are detected in radio as a function of distance (left) and velocity offset (right, in km s⁻¹ units) from the BCG. Vertical dashed lines mark the position of 1× and 2× the MeerKAT FWHM and the Ophiuchus galaxy velocity dispersion. The histograms show the distributions of the total number of spectroscopically confirmed cluster members (line) and the subsample of those detected in radio (color).