No island there
In November 2012, a research ship crossed the Coral Sea between New Caledonia and the Chesterfield Islands and sailed straight through an island. Nothing scraped the hull. Under the ship the water was 1,488 metres deep, and in places more than 2,300.
The island was called Sandy Island. It had been on the maps for more than a century.
Its life started with one report. In 1876 a whaling ship, the Velocity, came back from the Pacific with two notes from her master: heavy breakers, and some “Sandy Islets”. Both went into an Australian maritime directory in 1879, then onto a German map in 1881 and a British Admiralty chart in 1895. Charts of that era listed every possible hazard as a precaution. A maybe was safer to print than a nothing.
Then the copying began. Each new map took the last map's word. Nobody sailed back to check. When enough ships failed to find it, the hydrographers did the honest thing and printed “ED” beside it: existence doubtful. A small, brave admission to put on a chart.
France removed it from its official charts in 1974, after a flight over the empty water. Australia removed it in 1985. The correction was passed to other countries. And Sandy Island stayed anyway, inside the big digital shoreline files the world's maps are built from. That is how it was still waiting for the Southern Surveyor in 2012. The lie outlived the charts that told it, because the copies never got the fix.
Crocker Land is the darker version. In 1906 Robert Peary stood on a ridge in the far north and reported land glimmering about 130 miles away. He named it after a banker who funded him. In his own diary, at the time, he wrote that no land was visible. The island was invented, most likely to keep the money coming. Backers of Peary's other claims needed it to be real, so an expedition went looking.
They sailed in 1913. Real crew, real scientists, and a guide, Minik Wallace, an Inuk man Peary had brought south as a boy in 1897. They crossed the ice, reached the coordinates, and found open sea. There is no Crocker Land.
Both stories run the same way. A claim gets printed. The printing gets copied. The copying gets treated as proof. And the one position that costs you something is the one that says: I went there, and it is not there.
I keep a version of that for myself. Find the ground before you trust the map. Agreement is not evidence. A thing can sit on every chart in the world and still be water.