About underwater sounds.
The creaking sound is quite normal. It is maybe a bit loud but hull pressure buckling as well as buckling was quite loud. You are in an environment which due to the air inside enhances sounds. That is also why for instance the hydrophone works so well. In water sounds travel very far and can be very audible even to the human ear.
Of course what really should happen if you go quite deep is that the inside bolts and rivets become projectiles flying around inside the boat and leaks springing everywhere. Not rendered in I am afraid.
What annoys me the most is that when I am in a storm and dive I can still hear the wind blowing even at 70 meters.
No solution for that yet I think.
Ashikaga.
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