...reminds me of Heyerdahl, expecting to find a small island somewhere in the Pacific as shown on an old map, to break the raft’s journey, and finding nothing but breakers crashing over a submerged reef.
Yeah, that showed some daring — perhaps because of high tide, perhaps because the slightly submerged chunk of land had vanished, the Heyerdahl raft and crew passed right over the charted position. I wouldn’t have tried that one. :’)