Does not compute.
Got a very informative video about 093 family [*MEDIA=youtube]EnMyKX-5Y10[/MEDIA]
So if the 093A is around 110 db, then it is time to update some charts. Improved LA class is said to be around 105, while Seawolf, Virginia and Astude classes are around 95 db.
@Interstellar, how far off is the speculation below,
EDIT: Original -
SHANG I-class SSNs (Type 093), four SHANG II-class SSNs (Type 093A).