Everything on the Navigating To Anegada page is still correct.
The approach waypoint that you mention is included for safety. From that position, you should be able to see the outer channel buoys, and you have a bit of room to the east of any rhumb line to that waypoint to allow for some error in navigation. If you go from Colquhoun directly to the outer channel buoys, you will not have much room for navigation errors to eastward of the rhumb line.
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