Index of Undersea features

Ya-hsi An-sha
Yakobi selfvölgy, Strath, Valley
Yakutat Canyon, Seavalley, selfvölgy, Strath, Valley
Yermak Plateau, podnyatiye, podvodnaja vozvyshennost', Rise
Yermark Rise
York Breakers, sziklazátony
York Shoal, zátony
Yucatan Bank
Yucatan self, Shelf
Yusun, mel', Shoal, sziklazátony
zholob Yuzhnogo Mysa