No it wasn't our friendly BdU telling me to be more agressive or asserting me I'm doing a good job. It was a message originating from a friendly (Blue) ship-icon (Diamond).
You can even ask the radioman to report it and then he tells me 'nearest radio contact is 1130 km away'
It will cost me 42 hours to get there, so I will probably never know what was the real message
