It is hard to check if you don't have a map to check against, but in the waters I used to sail in Norway, all lighthouses seems to be there, but no rocks or are

It is hard to check if you don't have a map to check against, but in the waters I used to sail in Norway, all lighthouses seems to be there, but no rocks or areas with shallow water are marked, which makes the map useless for navigation there. This may come, but before it is there, it's not safe to navigate using these maps. I also dislike that the line extending from the lighthouse sectors are not drawn, as that is very useful when navigating at night. They do have the intervals of the light houses, which is good. They also have a download function, which is important at sea, since you cannot expect to be online at all times at sea, but I did not get it to work. Since I've always used paper maps on sea, I can't tell if they have the right download formats if it should work. All in all it is a nice testbed for testing out concepts, but still not ready for prime time. A sea map has much more stringent requirements for accuracy than street maps, and this still below the bar.