Originally Posted by gap

Very useful, thanks

...but...

is the sea around the Pierre Noires lighthouse really that deep?

I have checked on Google Earth, and in reality near that lighthouse the seabed should lay under 10-12 meters of water. Either you entered the wrong coordinates or, as it is more likely, devs got the sea profile totally wrong there and we will have to fix it: I can not create a 80-m-high island lol