The people in this screenshot don't know this, but this isn't the first time this comparison of water deity = space deity has been made in Japanese media.
People who know touhou should know when they built their rocket to the moon Reimu calls on the Sumiyoshi gods so that the space "ship" makes it to the moon safely.
---- To power the rocket, after previously being told to learn to how to harness the myriad gods by Yukari Yakumo, and with a tip from Youmu Konpaku and Yuyuko Saigyouji, Reimu calls on the God of Voyages, Sumiyoshi, to act as the rocket's three stages. Additionally, the three stages were named Alnitak, Alnilam, and Mintaka, after the three stars in Orion's Belt, on a suggestion by Marisa and Eirin Yagokoro. Eirin also secretly affixes a piece of the Lunar Veil to the cone of the rocket, ensuring its journey to the Moon. ----
---- The tsutsu part of the names of the three gods has a connection to the planets, and there is a theory that suggests the Sumiyoshi sanjin are the deification of the three main stars in the Orion constellation. In the olden days the Orion constellation was used for navigational purposes so it was perhaps for this reason that they were deified. Also, the locations of Tsutsu on Tsushima Island, Tsutsuki on Iki Island, and Tsutsuki in Itoshima, Fukuoka prefecture are in the arrangement of these three Orion stars. ----