My vote goes to Bizer, but....
Duncan has invented a numbering system for the bouys. That is very nice for GPS labeling, because you can get to know them much like you do the numbered bouys. I wish the MP would adopt Duncan's system, so that Bizer could use them too. I think Bizer is more accurate, because they participate in this forum, which gives them lots of feedback. They also have a reward system for new rocks - and I know first hand that they pay. For the wall of my home I like the Duncan map better but for navigation, I use Bizer.
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