Laurent, that's an interesting idea, doing a model of a boat that was planned but never built.
I like it!
A couple of comments though.
I'm not sure, but I don't think the boats leaving Bremen much time around Iceland. That was more for the boats based in Norway since ti was closer. Doesn't mean it wasn't possible though.
Near the end of the war, emblems on the CT side were rarer. They got painted over during refits, and not renewed. Removed with new plating when the CT's were updated into later Turm versions. Or just done away with after schnorkels since the boats spent less time on the surface. Also, many emblems were specific to certain flotillas. There is a URL where you can look up the emblem of every U-boat that was ever launched if you're interested.
I may be wrong (and others like dougie, rokket, Snowman etc. might have better info than I), but I think the wavy patterns were more often seen in the more southern boats. Probably something to do with the light conditions, or the type of weather and wave combinations. Mediterranean boats often had a sort of blotchy pattern, almost like flowers, of a blue/grey or sometimes green/grey. Northern boats often had lighter grey colours (I think it's dougie who published something on the specific shades of grey used) and a few of them were even painted white, sometimes with disruptive camo, sometimes not. There's at least a couple of northern boats that were all white (sometimes with wind deflectors painted black), at least one I've come across with the casing grey but the CT white, and U-711, the one I'm doing, white but with 3 black wavy lines (one amidships and one equadistant between there and the bow/stern).
It's a good idea to do a boat that never existed, it's gives you a lot of latitude to do things that were charactaristic but doesn't peg you down to one specific boat. However, there were still things that were specific to certain areas and times that must be taken into consideration.
(I found out recently that the boat I'm building (because I liked the Turm 4 with a deck gun) might not have existed as such. While U-711 was one of the last to give up her deck gun, it was still before the CT was modified to Turm 4. But I'm too far along to go back now. and besides, it looks pretty cool with a deck gun in front of the Turm 4 variation.)
