The Atlantic Ocean borders five continents: **North America, South America, Europe, Africa, and Antarctica.** The claim it touches only three is incorrect.
| Continent | Coastline Character | Key Marginal Seas |
|---|---|---|
| North America | Canada (Labrador, Newfoundland), USA (Maine to Florida), Mexico (Yucatán), Central America (Caribbean coast) | Gulf of Mexico, Caribbean Sea, Hudson Bay, Baffin Bay |
| South America | Venezuela to Argentina (including Falklands) | Caribbean Sea, Río de la Plata estuary |
| Europe | Norway to Gibraltar (including UK, Ireland, Iceland) | North Sea, Baltic Sea, Mediterranean (via Gibraltar), Celtic Sea |
| Africa | Morocco to South Africa (Cape Agulhas — official Atlantic/Indian divide) | Mediterranean (via Gibraltar), Gulf of Guinea, Walvis Bay |
| Antarctica | Coastline along **Weddell Sea**, **Scotia Sea**, **Bellingshausen Sea** (marginal seas of Southern Ocean / Atlantic sector) | Weddell, Scotia, Bellingshausen, Amundsen (Pacific sector) |
The **International Hydrographic Organization (IHO)** defines Atlantic limits:
The Atlantic is the **ocean of the "Western World"** — linking five continents, driving the AMOC (global conveyor), and shaping human history from Vikings to the slave trade to transatlantic cables.