A "Departure" is not what a vain people of landsmen may think. The term "Landfall" is more easily understood; you fall in with the land, and it is a matter of a quick eye and of a clear atmosphere. The Departure is not the ship's going away from her port any more than the Landfall can be looked upon as the synonym of arrival. But there is this difference in the Departure: that the term does not imply so much a sea event as a definite act entailing a process-the precise observation of certain landmarks by means of the compass card.
Your Landfall, be it a peculiarly-shaped mountain, a rocky headland, or a stretch of sand-dunes, you meet at first with a single glance. Further recognition will follow in due course; but essentially a Landfall, good or bad, is made and done with at the first cry of "Land ho!" The Departure is distinctly a ceremony of navigation. A ship may have left her port some time before; she may have been at sea, in the fullest sense of the phrase, for days; but, for all that, as long as the coast she was about to leave remained in sight, a southern-going ship of yesterday had not in the sailor's sense begun the enterprise of a passage.
