The article would make one think that a communication had taken place between the restored WW2 radio gear and the new sub. I don't think that was the case. My apologies if I am incorrect but it would be nice to get a clarification. Vintage WW2 battleship radio gear was able to broadcast morse code (CW) and amplitude modulation (AM) on shortwave frequencies. From what I know about modern day subs, their communication would be on VLF (Very Low Frequencies) and satellite. Somehow, I think this was more of a staged communication on VHF with ham radio handhelds. Hats off anyway to those who had restored the vintage battleship gear as I'm sure that was done without spending a dime of our tax money. Sorry, but I'm just not into dog and pony shows.