TV series example of the word

Game of Thrones Season 7, Episode 3
Euron Greyjoy's armada owns the Narrow Sea.

Game of Thrones Season 7, Episode 1
Right now, they're sailing across the Narrow Sea,

Game of Thrones Season 1, Episode 5
Of course, you would have friends from across the Narrow Sea.

Game of Thrones Season 1, Episode 5
and the Dothraki horde crosses the Narrow Sea...

Game of Thrones Season 5, Episode 4
Why did your ancestors cross the Narrow Sea and conquer the Seven Kingdoms?