Velocity Made Good (VMG) Calculator

Formula

The formula to calculate the Velocity Made Good (VMG) is:

\[ VMG = BS \times \cos(TWA) \]

Where:

\(VMG\) is the Velocity Made Good in knots
\(BS\) is the Boat Speed in knots
\(TWA\) is the True Wind Angle in degrees

What is Velocity Made Good?

Velocity Made Good (VMG) is a measure used in sailing to indicate the speed at which a boat is moving towards its intended destination or waypoint. It is the component of the boat's speed that is in the direction of the waypoint. VMG is particularly important in racing and navigation, as it helps sailors determine the most efficient course to achieve the highest speed towards the destination, considering the wind direction.

Example Calculation

Let's assume the following values:

Boat Speed (BS) = 10 knots
True Wind Angle (TWA) = 45 degrees

Using the formula:

\[ VMG = 10 \times \cos(45^\circ) \approx 7.07 \text{ knots} \]

The Velocity Made Good (VMG) is approximately 7.07 knots.