I just met my first three TTs during operation Werbelung(sp) I think, or something (Norway) in may of 1940. Got a report of a Task-Force north of Trondheim, and though out my patrol (just south of there) the icon stayed. so out of curiousity I snuck north and stuck my bow into the Fijord as was delighted to see that the Taskforce was napping there. 4-5 DDs guarding 3 TTs...
I managed to dispatch the three TTs... though.. using unorthodox means.... 6 Steam torps set on slow, targeted out near max range (11500m of the 12500m range.) using Mag Triggers... Only had one premature fish...
all three went down in flames after on hit. (GW mod, no less

) Mind you the weather couldn't have been much more perfect, a calm still night. The DDs never knew what happened. Ingress and Egress were both surfaced w/decks awash.