This paper present a newest version of global ocean tide model which has a high accuracy even in coastal areas. I do believe that this paper is an important contribution to the tidal community and helpful to tides-related researchers. But it seems that there is a potential problem in the data which needs to be solved.

    Tides in the deep sea should be highly consistent with the equilibrium tidal theory. According to the theory, the ratio of P1 amplitude to K1 amplitude is 0.3309, but due to the nearly diurnal free wobble (NDFW), the acutal ratio is 0.3180 (R.D. Ray, On Tidal Inference in the Diurnal Band , published in JTECH, 2017). Below is the ratio of P1 amplitude to K1 amplitude in the region near Hawaii,US using EOT20 model.  In this region, water depth is more than 3000 meters, thus, it is found that in most areas the P1/K1 ratio is consistent with theory. However, in the west of Hawaii, there is a region where the ratio is abnormal (obviously larger than 0.5 or less than 0.1). Therefore, I think the authors may need to carefully check their codes to eliminate  possible errors to further improve the reliability of the EOT20 model.