B&G H2000 Pilot DISCONTINUED User Manual

Page 79

HB-0845-06

2.9.54 VMG

heading:

SPEED

Function

text:

VMG

Update

rate:

1Hz

Units: Knots

Note

1. Upwind/downwind

Referenced.

As a measure of performance VMG has both advantages
and disadvantages. It is calculated from the true wind angle
and the boat speed.

True Wind

Direction

VMG
5.54
Knots

Boat Speed
6.4 Knots

True Wind
Angle = 150

VMG KT

BOAT SPD KT

Down Wind

VMG
4.44
Knots

Boat Speed
5.8 Knots

True Wind
Angle = 40

True Wind

Direction

Up Wind

VMG KT

BOAT SPD KT

Figure 7 - Calculation of VMG