The concept of the Gulf Stream wasn't "invented" in the sense of a specific date and creator. It's more about the gradual understanding and mapping of this powerful ocean current. Here's a breakdown:

* Early Observations: Sailors in ancient times noticed the warm waters flowing northward along the eastern coast of North America. They used this knowledge for navigation and fishing.

* First Maps: While there's no definitive first map, early cartographers like Benjamin Franklin (1769) played a key role in mapping the Gulf Stream based on observations from sailors and ship captains. He created a map showing the current's path, which was crucial for faster transatlantic travel.

* Scientific Exploration: In the 19th century, oceanographers like Matthew Maury (1855) further studied the Gulf Stream, using detailed observations and charting to better understand its path and influence.

* Modern Mapping: Today, we use advanced technology like satellites, buoys, and oceanographic models to create highly accurate and constantly updated maps of the Gulf Stream.

Therefore, it's inaccurate to pinpoint a specific "invention" date. The understanding of the Gulf Stream evolved over centuries, thanks to the contributions of many individuals and advancements in technology.