Frame57 you nailed it!
I had the voice activated commands set to 'Always On' and I was using the mute button on the headset when I wasn't issuing orders. I started another game and right away I got the 'Surface, surface, surface' so I switched off the voice recognition 'Always On' and use the space bar as my push to talk rather than my mute button and that fixed the problem right away.
Now I just need to figure out how to survive a coordinated attack encounter with a pair of Beriev Be-12N Mail amphibious ASW and maritime patrol aircraft. Only kidding, I don't think that encounter is survivable. Once the MAD sensor has highlighted your presence to the aircraft and your position has been triangulated with active pinging from the Nartsiss search/attack system, and those AT-2 torpedoes are in the water and homing in active mode, life gets kinda difficult!
- Martin.