The city ferry fleet shuttles about 70,000 people a day between Staten Island and Manhattan, a 5.2-mile trip across New York Harbor that takes about 25 minutes.
More than a dozen people have been shuttled between Staten Island and Manhattan.
From the context, we know that "The city ferry fleet shuttles about 70,000 people a day between Staten Island and Manhattan" and 70,000 is more than a dozen (12), therefore the statement is definitely correct.