Quote:
Originally Posted by cdrsubron7
... 4. I heard a sound. Kind of a tinging followed by sound like a fan blade hitting a grill cover. Noise occurred when at PD or deeper. Did not hear it when surfaced or using TC...
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Well, "The Sound" is loud, and continues to occur after surfacing - or anything, for that matter. It sounds like someone is hitting a pipe with a pipe wrench, right next to you. However, I am interested in the sound you've encountered. What boat are you using in this case? Did you have to "go deep" before it sounded, or did it start immediately? Or only when submerged, like some sound is emulating a bent fan blade, and that fan only "runs" while submerged?