As we sail to the upwind, we decide we want to get over the right side of the course. Our goal is to sail towards clean air and then tack over. As we are executing this plan, a port tacking boat approaches us and shouts at us asking to cross. If our goal was to go to the left side, we certainly would have waived him by as to avoid him tacking just below us and causing us to deal with him and slow us down. We decline his request and force him to tack to the left side as we tack to the side.