Alton bay navigation question

[Mee-n-Mac]

Originally Posted by Rattlesnake Gal

On the same note, why is the marker near Treasure Island black, not red like it should be? Am I missing something?

I've wondered the same thing myself. Hested west on and E-W course, say coming from Ship I, the black marker would tell you to pass btw it and Treasure I, which would be a bad thing. You'd think it would be red or a red/blacked paired such as to indicate a keep out zone