Hello Glenn,
As you know, each bollard set had two individual bollards each. I have seen one photo of a bollard set on an unidentified U-boat (not U 190) which has one bollard extended and the other retracted. However, this is very unusual. In every other photo the set would either have both bollards in the set either retracted or both extended.
The IXC/40s like U 190 had five bollard sets -
A - centrally at the bow
B - centrally on the forward deck
C - aft deck, starboard side
D - aft deck, port side
E - centrally at the stern
Usually when in port they would all be extended (A, B, C, D and E). Indeed a few photos of U 190 show this arrangement with them all extended.
But this did not happen every time. I think there is one photo of U 190 in which bollard set D was retracted and all the rest extended.
I would go with all the bollard extended for your U 190 build. By the way, when are you depicting the boat? Is it before or after repainting by the Canadians?
Cheers,
Dougie
Cheers,
Dougie