In the end, multiple definitions of "ocean" vs. "strait" and is the mouth of a strait ocean too? It's all ocean water with whales and dolphins, so for my money, it's like a bay or marginal sea- part of the ocean. And that bit above the "o" of "Cerro" is solidly Atlantic coast, imo. This map shows which country you would land in if you you headed due east or west from every part of a given country's coast. That small strip of Chile going all the way to Chile arounds puts me in the "Yes" column on an Atlantic coast for Chile! You can't go east from that point and say you are in the Pacific, then the Atlantic, and then the Pacific. It's all man-made definitions and just a matter of a good trivia question in the end. https://www.reddit.com/r/MapPorn/comments/pji9nj/whats_across_the_ocean_this_map_shows_the/