With CMAP-93 I went aground in Senegal because the green and red of the entrance in casamance river were not updated... but what was crazy were two dolfins showing us the way. We followed the dolfins untill inside the river and that was great. Even because in that area you can find either the sharks in the sea or the croccodiles in the river.
But but but I got one more lesson: Google
Maps somethimes shows the routes of the ferries: the route
of the ferry
that goes to Ziguinshor in casamance ir the right one to enter the river.
Furthermore: in Dakar at the Circ de Vouil (Sailing Club) I found a freak one living in the sofa of the club who collect the gpx of all the sailors passing there and he distribute them for those who need. I got them for free. But the wrong one. And I went aground. But I went aground slowly on the sand with an iron maiden sailing boat
Ceers from Italy