We attempt to keep the support boards as uncluttered as possible so that people who are looking for help on problem missions don’t have to wade through a lot of banter.
That is why there are strict rules on what and how to post there.
In a buoyed channel such as Southampton Water waypoints are not necessary, especially when they lead the player to take a course other than the prudent one.
Instead, you could have taken advantage of the possibility—not possible in the SS08 mission system—to penalize the player for straying outside of the marked channel.