The Dial Up
To prevent Dial Ups, the entry line is tilted so the port-entry boat gets across the starboard-entry boat. If the wind shifts, or if the port-entry boat is late entering and cannot cross, it's in a world of hurt. At Position 1, both boats are allowed to enter 2 minutes before the start. Red is slightly too far upwind when it enters. At positions 2 and 3, Red, on port tack, realizes it cannot cross Green, which is on starboard tack. At Positions 4 and 5, Red heads up to pass astern of Green, but Green heads up as well. At this point, Red, because it is a port-tack give-way boat, must keep clear of Green. Green can alter its course, but is restricted by Rule 16.1 of the Racing Rules of Sailing and must therefore give Red room to keep clear.