Instruction manual

Operating Modes 22
VMG Explained
Whether you are sailing upwind or downwind, the SC-1 breaks your boat's velocity into two
perpendicular components. One component is perpendicular to the wind direction. This component
is effectively wasted as it is not helping you make any progress upwind or downwind. The other
component is parallel to the wind direction. This is your VMG.
Tuning the Wind Direction in VMG Mode
Use the following guidelines to adjust the wind direction programmed on the SC-1 when you are sailing
upwind:
• If the indicated VMG seems like it's consistently higher on starboard tack, increase the value of
the programmed wind angle.
• If the indicated VMG seems like it's consistently higher when you are on port tack, decrease the
value of the programmed wind angle.