USS Darter grounded under enemy fire..but all her crew was safely rescued by USS Dace.
Fleet boats never refuelled at sea ( never seen a photo showing a refuel at sea )
U-boats are a different thing, in the south atlantic and indian ocean they usually were refuelled by surface ships like blockadebrechern and even auxiliary cruisers ( the mighty KMS Atlantis was lost while refuelling U-126 )

well we can of course mod fuel delivery, pizza service and tactical nuklear strike but lets stay at the ground. There should be a little bit realism. Think about it.

< :oops: . . . embarrassed, Letterboy abandons his Pizza Delivery mod.>

You could switch it to ice cream delivery, we had a barge for that ;)

I only have problems with S boats . Maybe lurker can look at his latest rsrdc . Obviously if S boats were never supplied fuel mid ocean then either the boats are being sent too far or if they are being sent to patrol the correct place then the fuel range needs adjusting to be realistic .

Dagnabbit, I was looking forward to that one, too!