求翻译I'm going to travel in the sea in Qingdao with my classmates.

求翻译I'm going to travel in the sea in Qingdao with my classmates.
求翻译I'm going to travel in the sea in Qingdao with my classmates.

求翻译I'm going to travel in the sea in Qingdao with my classmates.
是这句有语法错误?还是我的英语水平太低,所以理解错误?我怎麼看都觉得这句按字面意思是：与同学一起,从青岛出发,坐潜艇在海底漫游.
我一直都认为：坐船在海上畅游应该是 travel BY the sea.所以,一看到 travel IN the sea 便即时联想到是在海水裏面 travel.
不知道是这句子有错,还是我理解错!希望有高人指点!