Sailors in the 16th-18th century dreaded "rounding the horn" because of strong winds and heavy seas. cape horn is about latitude 55°s at the tip of south america. these sailors considered this a passage from the atlantic to pacific oceans, but this ocean is now often called

 These sailors considered this a passage from the Atlantic to Pacific oceans, but this ocean is now often called the southern ocean. It is also known as the Austral Ocean which it consists of the southernmost waters  located at 60 degrees south latitude and surrounding the Antartica. It is the southern part of the atlantic, pacific and the indian oceans. 

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