Nexus NX2 Wind Data Installation And Operation Manual page 25

WIND DATA
Down Wind:
When sailing down Wind, the boat can always be sailing at the
highest WCV (speed towards the mark). When [NXT] is [00°] you
should jibe because your drift is not important.
The functions [BTW] and [NXT] is toggling, but can be locked or
unlocked by use of the SET.
Note! This function is only used on the last leg.
WIND
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