Thomas, today I was surprised by the progress. It gets better and better.
I thank Baikal for the good examples. The CSC | Kompass for OpenCPN und Chart Navigator
example is very interesting, never knew about it. There are some good things here too.
Red Circle = BTW Bearing to Waypoint = 23 degrees
Brown Arrow = ???
Blue Arrow centered = Compass
Blue Arrow = TWA True Wind Angle = 47 degrees ?
Blue Triangle = Target VMG Angle = 49 degrees
Bring the blue TWA-arrow inline with the blue marker, and you do the optimum VMG up- or downwind.
Upper Left = Bearing to Waypoint? = 23 degree - Red Circle inside Compass
Upper Right = Waypoint Name
Lower Left = DTW Distance to Waypoint
Lower Right = Predicted SOG = ~4.1 kn
SOG 4.01 kn
Current Speed 234 degrees
Current Direction .43 kn
Heel 5.8 < degrees
Leeway 1.9 < degrees
STW 4.24 kn
Polarspeed 73% / 5.82 kn
Performance VMG 2.61kn
Target VMG Angle 49 degrees
Target VMG 72%/ 3.6kn
I may not understand this very well.
Where is the Target Boatspeed?
Are you using Target VMG Angle and Target VMG instead?
What exactly is Polarspeed 73% / 5.82 kn ?
What do the numbers represent?
What is the Perfomance VMG 2.61kn? Is that the Actual VMG?
Is Target VMG 72% / 3.60 kn numbers similar to Polarspeed numbers? Target VMG is 3.60 kn and that value is 72% of something? or is this expressing a divisor?
I really like the two blue arrows matching up. It helps us know what to do.
I am having trouble visualizing how to use the data presented elsewhere.
It seems to me that if we are concerned about
target values | actual values
target VMG | actual VMG
target VMG angle | actual
target Polarspeed | actual STW
They should be presented in this manner, so it is easier to comprehend.
(I may have this a bit messed up due to understanding)