In the update 0.5.12 there was an opportunity to change the transparency of the water on the mini-map, but now this mod is available in a single version, which allows you to change the transparency of the mini-map completely (both the sea and the islands).
It is a modification of the mini-map World of Warships making it more transparent, which increases the view of the terrain, because now you can see what is in the area where the mini-map is located. The author made 2 options, in the first completely transparent mini-maps, and in the second the islands remained opaque. In addition, both options have also a different degree of transparency, it is 10%, 30%, 50% 70%.
Adaptation for the patch 0.8.1
Copy the contents of the archive to the folder World of Warships / res_mods / 0.8.1