ACC Upwind Performance Tuner

The ACC Upwind Performance Tuner is designed for Virtual Skipper 5 (Vsk5) sailors to determine the optimal foresail, True Wind Angle (TWA) and Target Speed based on True Wind Speed (TWS). It provides a scatter plot visualization showing the recommended sail (Genoa or Jib) for different wind conditions.

User Guide

1. Understanding the Scatter Plot

• The chart plots True Wind Speed (TWS) (knots) on the X-axis and True Wind Angle (TWA) (degrees) on the Y-axis.

• Blue dots represent conditions where the Genoa is recommended.

• Red dots indicate conditions where the Jib is the better choice.

• Vertical green, yellow, and red lines represent Beaufort scale wind force levels, helping sailors understand wind intensity.

2. How to Use the App

Basic Usage:

1. View the Chart: Identify the sail selection based on plotted wind conditions.

2. Interpret the Colors:

   • Blue dots = Genoa

   • Red dots = Jib

3. Check Wind Force Annotations:

   • Green lines mark Force 4-5 (Moderate breeze)

   • Yellow line marks Force 6 (Strong breeze)

   • Red lines mark Force 7+ (High winds and gale conditions)