There's been a pushpin in my google earth map, just on the coast of the Caspian Sea, near to the Ekranoplans, with the letter Z, just waiting to be posted.
Now I'll be the first to admit, it's not the best Z in the world, but it's a Z none-the-less.
God, as Zorro, has cast a Z with his... hovercraft? For it is something like an Air Cushion Vehicle or Ground Effect Vehicle that has made these marks.
It's co-ordinates are: 42°53'1.63"N, 47°39'51.62"E and clicking on them should take you there, if I've remebered how to do this. (It's been a while...)
B, J and N left to find!
I could rotate the Z through 90° and call it an N, but that's cheating.