ἅλμην πιόντες ἐξαπῆλθον τοῦ βίου → they drank seawater and departed from life
steer: P. and V. κυβερνᾶν, Ar. and V. ναυστολεῖν.
sail over: P. and V. πλεῖν (acc.).
Absol., take to the sea: P. πλωΐζειν.