Positioning of the wing boat is - as with the umpire boat - the key to successful 'winging'. Generally speaking the wing boat needs to be at a right angle from the boats related to the position of the umpire boat. When the latter is behind to look at the distance between the boats, the wing is beside the boats to look for the overlap. When boats cross, the umpire boat is with the port tack boat, and the wing with the starboard tacker.
Match racing starts at the four minute signal, when boats enter. The first encounter is usually a port and starboard encounter. Unless one of the boats is late or otherwise not able to go at four minutes, the Yellow boat on starboard tack will try to "go" for the Blue boat on port tack. The wing boat starting position is to windward off the starting vessel or committee mark at a right angle to the starting line to check early entry of the Yellow boat. Once that has been done the wing has to give information to the umpires about the direction Yellow is pointing. To do that, the wing motors to a position behind/besides the Yellow boat, so that his line of vision goes trough the helmsman of the Yellow boat looking at Blue. That way the wing can tell if Yellow is 'aiming' at Blue or steering a course above or below.
When boats end this first encounter in a 'dail-up' the wing boat is beside them relaying information about the overlap. Because of the low speed and the proximity of the umpire boat, this is however not the most important piece of information. It is the speed of the boats through the water, specially if they go backward. That is something the wing can see from its position much easier than the umpires. When sails are backed it is sometimes crucial to know if a boat has begun moving backward to determine right of way.
Next time in "Winging it" part 2: The rest of the prestart, the beat and the windward mark.
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