Danurve,
Just one man's opinion. Assuming these messages are solely for immersion. Obviously U-boats would intercept any messages that came within radio range and not just those intented for the particular boat, so a U-boat would see many more than those just sent to itself.
For raider messages, I like the idea of sending them to "Deutsche Kräfte auf See".
For general messages from BdU, you might consider sending some or all to "all U-boats", or "all U-boats North Atlantic" (not sure what the general and translated terms in use would have been).
|