DG_Alpha : ok, i was searching for this site and you give me the answer, thanks
it is interesting, specially here: 2 shafts
http://www.wunderwaffe.narod.ru/WeaponB ... raw/09.jpg
with the difference for the Nurnberg here: 3 shafts (central shaft for the diesel)
http://www.wunderwaffe.narod.ru/WeaponB ... raw/13.jpg
Alvama:
with this drawing:
http://www.wunderwaffe.narod.ru/WeaponB ... raw/04.jpg
you could maybe see why are those turret not aligned (if it is your question):
for an adversary coming in front of the ship, there is only the front turret with 3 guns for replying,
but if the adversary could be put a little more on the left, the first rear turret as a wider angle of fire, as it is placed near the port side,
but if the adversary could be put a little more on the right, the rearmost turret as a wider angle of fire, as it is placed near the staboard side,
thus having 6 gun for returning the fire and exposing the minimum of the ship side....