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RayTech RNS V5.0 - User’s Manual
Vmc plot
The Vmc plot screen displays the Velocity Made good on Course towards a specific
mark or target. Although similar in concept to VMG, Vmc is equal to VMG only when
the bearing to the mark and wind direction are identical. Vmc is used when you expect
the wind to change between your present position and the target (primarily in long
course racing). In such an instance, it may be a smarter tactical move to sail toward
your target at the fastest possible speed, even if that heading isn’t directly toward the
target.
To use the Vmc plot, select the Course and true wind direction to be plotted by clicking
on the Course, Twd and Tws (kts) up/down arrows or entering the numbers directly.
By default, course and Twd are initially derived from instrument input, but the screen
allows you to change these figures to calculate what happens if the wind or course
changes.
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Summary of Contents for RayTech RNS 5.0
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