Marker rounding direction
The Rio race yesterday (FEB 10) had us loop a marker. It was marker 2, in the 3-2-1 part. When laying a course, no marks should ever be looped. Running a string around all the markers should cause the string to touch the marks but not loop them. Not a major deal in a virtual race but with physical boats it would be complete havoc.
I checked and it looks like currently this only happens in Pro. There are 12 courses in Pro and 3 of them have a loop in them
[1, 2, 1, 3, 2, 3] # loop 2, 1, 3
[1, 2, 3, 2, 1, 2, 3] # loop 3, 2, 1
[1, 2, 3, 1, 2, 3, 1, 3, 1, 2, 3, 2, 1, 2, 3] # loop 3, 2, 1
The last one was the one from yesterday's race in Rio. I think the courses run in a cycle so you get loops 25% of the time.