In terms of dialogue, it’s better to err on the side of talking too much with a stranger. Feed them as much information as possible, but also let them know that if they want a quieter boat, that’s fine with you. If they do say that they prefer a quiet boat, then you need to respect that and channel your energy into your movements and ask them for feedback after the race. There’s no time to build deep trust, so when you are talking, you have to come across as highly competent and reliable with your information--don’t say anything that you don’t know to be correct, although feel free to act as a Question Master and ask guiding questions. In fact, if they don’t mind, ask even more questions than usual, especially about things inside the boat, like your body movements and tuning. A stranger might feel shy about correcting you, so you need to seek out constructive criticism that will help your racing run more smoothly.