The Atlantic Ocean
Clockwise around the Atlantic Ocean!
Doesn't contain the ocean's larger subdivisions such as the Mediterranean or the Gulf of Mexico (but I have to admit in cases like the Bay of Biscay I pulled a "ach if that's not Atlantic what is" so no scientific reasoning here :D ).
avg. score: 7 of 52 (14%)
required scores: 1, 3, 5, 8, 11