For Odysseus to make his transition from the realm of the living to the realm of the dead, he must first sail his ship to the end of the sea, delimited by the cosmic river Ōkeanos, and then he must sail on by somehow crossing this river. The verb that I translate here as ‘cross’ is perainein, O.10.508. Then he must beach his ship on the banks of the Ōkeanos, O.10.511, before he can disembark and then proceed into Hādēs.