HI,
When planning a BOAT route the wind direction is changing based on the 'wind barbs' options
North up - seems to present the 'compass' direction
Bottom to Top - I'm not sure but it looks to me as the relative wind comparing to the boat movement
Right to Left - not clear.
Can anyone provide better description on these options. When I started to use it I was confused by wind dir and it took me time to figure out that the wund barbs options affect it.