Why does the Chorus use the metaphor of moving "across the white-capped ocean seas" to describe man?

This excerpt is from 'Antigone'

Explanation:

It says, "He moves across the white-capped ocean seas blasted by winter storms". It shows human domination over nature not the divine authority over nature. In the play, the Chorus recounts the evnts leading to Antigone's tragedy. This shows that the guard fears Creon. Dramatic irony is used. Creon says, "A man who thinks highly of a friend than his country, well, he means nothing to me." This shows his loyalty to state.