I'm thinking one of these things could eliminate A LOT of arguments about when to tack. The mythical lift being so elusive.
Gunni,
LOL I hear you.
We help out at our club's new racer program, and wind shifts are a popular topic. One of the things that I believe is that an attentive helm is vitally necessary to detecting shifts. If the driver is not sailing 100% of the time to the telltails, they will simply miss the lift and drive right through it.
There is a saying in the racing community that you can watch cruisers to 'see the knocks, but not the lifts'. Its so true. An inattentive driver will know when he gets knocked (the sails starts to luff), but will most often not 'take his ups' when he gets lifted. The telltails are showing lift, but because the boat does not change, the driver simply takes another sip of his beer and plows on! ;^)