I knew this one would go down like a lead balloon
I am quite serious here - what I am thinking is that a Red sub is also under ice nearby and the twang sound
may be HFAS as he threads through ice bergs. So I'm getting a metallic noise followed by the whale cry.
Now its not far fetched to accept, knowing the USN are careful how they use active sonar due to its affect on bio.
I just wouldnt have expected to hear HFAS. :hmm:
Anyone any ideas ? Can you hear HFAS ?