The departure or setting sail of a ship (the official act of leaving port to begin a voyage).
客船は午前七時に出航した。
The passenger ship set sail at 7 a.m.
台風のため出航が翌日に延期された。
The departure was postponed until the next day due to the typhoon.
貨物船の出航手続きはすべて完了した。
All departure procedures for the cargo ship have been completed.