Work On A Dinner Cruise What Should I Wear For A "dress Casual" Dinner Cruise?

What should I wear for a "dress casual" dinner cruise? - work on a dinner cruise

I go to dinner (without drinks) cruise in June in New York for a graduation party. The calendar shows the dress is casual. I really do not know what that means. Can anyone use me some suggestions on what appropriate? To help you, I'm 22 and in the summer (if I had not learned). Pictures of examples might be useful. And, more specifically, what kind of footwear is appropriate?