I've heard that in order to use the speedtech on a cat that's not sailed flat, drag 10 feet or so of signal wire (with the impeller at the end) from the dolphin striker. This will allow it to drag through the water even if flying a hull.
<br>
<br>I've never used a mechanical speedo. I use a Garmin etrex (legend) GPS with a handlebar mount mounted to my tiller extension. You have to be carefull because the handlebar mount looses a good bit of the watertightness of the Garmin unit and I haven't found a good way to reassert the watertightness in this configuration yet.<br><br>[color:blue] Jake
<br>[color:blue][b]Nacra 5.2 (2112)