Suunto M9 Quick Manual page 28

AFTER THE RACE START
At the finish line:
1. Press ENTER
to store the
race finish
time.
2. Select
Finishline .
3. The unit enters
the race
summary
mode and
displays the
distance
sailed, the time
sailed and the
average
speed.
Set the TAD measurement for the port tack:
1. Press ENTER to store the tack heading.
2. Select Port Tack from the menu list.
3. Press ENTER to confirm the setting.
Tacking angle difference (TAD):
On up wind legs sail the optimum angle on both tacks and store the heading. The Suunto M9
indicates the difference in the vessel´s direction. H (Header) indicates that the vessel is moving
away from the target (wind heads up) and L (Lift) means the vessel is moving towards the target
(wind is lifting). Header on one tack means lift on the other. You should always sail in lifts.
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