Absolutely we were very surprised at how effective the bismarks disruptive was. when you see them on the water the tirpitz sometimes looks twice the size. Also the tirpitz splinters on a day when the water is just rippling, (not still, not choppy but just in between) at a certain distance the tirpitz really is disguised by the camo. its amazing, when out of the water you'd think they'd stick out like a sore thumb.
And the bismark did definately have more of an "active" lifespan because from what i can gather from documentaries ive seen, the tirpitz spent most of its time moored up in the fjords. (waiting to be bombed by midget subs, lancasters)
Thanks again for your comments
Grant