Work on the revised "Bismarck" drawing is in progress. There were many things to do, according to the suggestions of "acelancealoet": Replacing the main cranes for smaller ones (only for boats, not for planes anymore); redo all the lines and the shadings (btw. I don't know why, the initial drawing of Maomatic which I use as basic project design for my AU "Bismarck" had many, many parts left white, I don't know why...). Then, by redoing the lines I had to understand in detail what each part stand there for, mainly on the area on and around the funnel. And by comparing with detailed pics of big scale models I found in the net get the info I needed to try to redo "my Bismarck" the best possible. That's slow work, guys...
AU: In the meantime, GEMA (German manufacturer of radar parts) came with a new type of area search matress and "we" took the opportunity to replace the installed FuMO 27 by this new one, which is vertically polarized. It sends out stronger signals, on a slightly different frequence, augmenting the impact of the echo, of the reflected signals. This led to a new display in the radar control room, with better information of said echo. This new radar is designated FuMO 28, itself an evolution of the previously installed FuMO 27. The main change operationally speaking was that mounted on top of the main conning tower this radar set had an astonidhing range of some 40km, though a reliable accuracy for finding the range of the target was more on the 30km distance, with a possible deviation of some 0.2º. FuMO 26 had 0.25 already but a max distance of 25km.
This new radar set served as primary detection radar, its findings were then given to the main control room which, according to the type of enemy vessel, led the signal to other units, these ones serving as fire control stations. AA gunnery had different sets of precision radar units, with dish antennae of some 1.5 to 2m of diameter. The control room of the AA gunnery worked separately from the ones controlling the fore and aft heavy sea artillery plus the medium sized placed midship. Both control rooms - sea artillery and AA - had two compartments, one each for the front faced guns and the aft faced ones. This allowed a more independent operation if multiple targets showed up at the same time. However, and according to the arc of each gun mount, the ship's artillery was partially interchangeable in that the rear artillery could fire sideways together with the front one. In these cases, the main commanding station gave both sub-control rooms the same instructions regarding bearing, distance and height in case of attacking airplanes.
Another explanation I want to give regards the increased beam (and accordingly increased length and displacement) of "Bismarck": The North Sea and also the North Atlantic have - trusting here reports I read - different wave characteristics than the South Atlantic, the Indian Ocean and the Pacific. The distance between waves is shorter in the North Sea and in the North Atlantic and even being shorter, waves of astonishing heights can build up comparing to, for instance, what happens in the "Roaring Fourties" of the southern hemisphere (exception maybe the Cape Horn region, where the waves of the Pacific get "compressed" by the South America's tip, same happening to the winds blowing in the west-east direction.
These facts led to a wider ship than, say, the Iowa
class battleships, which are more sleek. Even Hood
had a lower length/width ratio. Being wider, Bismarck
was slower, even with another powertrain installed giving more 50.000 shp and four screws instead on three. The difference was some 2 knots at max speed, the German battleship reaching around 30 knots, but that was not the major concern of the leaders of the DKM. Much more important was the ship's stability and seagoing capability even high up to the Arctic and, on the other hand, the ship's navigation and artillery capabilities even (or especially) in foul weather.
This philosophy was applied to all the ships of the DKM planned and built after 1937. Maybe the one or the other knows the term "der blanke Hans", which was the way the German mariners (military and civilian as well) referred to the dangerous high white topped seas of the North Sea (ref. Cajus Becker "Verdammte See").
And here she is, according to the latest "state of the art" in 1940. More a "show off" of German naval technology of that time than a ship to fight traditional heavy naval battles, although she was sent in the Spring of 1941 to the Black Sea, to the newly opened German naval base at Varna, Bulgaria, officially to guarantee the integrity of the oil fields of the region (I know these are in Romania, on the other side of the border...), but in reality to wait for the "Baltic Alliance" to mount up a southern army to attack the Soviet army from the Black Sea, in a claw movement. But this is another story.