Sacred Mirror of Kofun

Hints:
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* On each of your dives, you need to take a specific number of photographs
  for later bioanalysis. Be sure to listen to your computer, which will 
  advise you when to click the shutter.

* Those bottles floating by aren't trash. Snag and inspect them.
                                        
* That beeping sound may not be water in your ears: it could be Morse code.
  To decipher it, check out the manual on the shelf in your cabin room.