Route rounding direction
Each waypoint within a route can have a Rounding direction applied which indicates whether you should leave the waypoint to port or to starboard.
Route Rounding directionThe Rounding direction feature is only available when Sailing has been selected as the Boating activity during the initial MFD start up wizard.
Rounding arrows are shown around waypoint symbols that have had a Rounding direction applied.

Rounding directions can only be applied to waypoints that are part of a route.