Since you are the expert on a speaking gig a major cruise ship, you need to be able to respond to all questions with authority. First, REPEAT the questions into the mic. Many venues are too big for the audience to hear the little woman in the front row’s question.
Now 4 ways you can handle “tough ones.”
1. Answer it.
2. Indicate that you don’t know the answer but that is a great topic you’d like to include in your talk and can the asker meet you after to chat.
3. Admit you don’t know but you WILL find out the answer and let them know.
4. If the question is really dumb (yes there are some dumb questions) OR if you answer it would take a whole lot of time to give, say that you are out of time, but would love to continue with the person in the hallway.
You must get out of the room at the agreed to time. The passengers want to get to Bingo and the room might be used after you for mahjong class. Be the expert during your talk and during the Q&A.