Jacquet Island was a

phantom island A phantom island is a purported island which was included on maps for a period of time, but was later found not to exist. They usually originate from the reports of early sailors exploring new regions, and are commonly the result of navigati ...

charted at approximately in the

North Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the "Old World" of Africa, Europe and ...

, just to the east of the Flemish Cap. Belief in its existence continued into the 19th century, when it was discussed by cartographers as a possible midway point for the transatlantic telegraph cable. John Scott of the '' Seaflower'' reported seeing it in 1836.

References

Phantom islands of the Atlantic Islands of the North Atlantic Ocean {{marine-geo-stub