The term PEQUOD'S OBSESSED CAPTAIN is referring to Captain Ahab, the main antagonist of Herman Melville's novel Moby-Dick. Ahab is a monomaniacal captain of the whaling ship Pequod, who is obsessed with hunting down and killing the white whale Moby-Dick. He is driven by his hatred for the whale, which had taken his leg in a previous encounter. Ahab's obsession leads him to ignore the warnings of his crew and ultimately leads to the destruction of the Pequod.