For those that haven't been there, (
Hanso Foundation), when you log in/sign up for the news letter at you get a message from Persephone.
Persephone was a Greek mythology character who was Queen of the underworld. (Origins here
Persephone Wiki)
She is often used to represent life-death-rebirth. With Cerberus being mentioned on the hatch door drawing (him being the three headed guard dog of the underworld), there seems to be multiple references to the Greek mythological underworld of Hades.
Any advancements on this theory? I'm wondering if some of this is a reference to Jack's Dad's recent appearance?
Have to do some more study for uni now, though I found a video on a p2p network from the Hanso foundation. It comes from a website but I can't remember where. It mentions the functions of the hatches. Going to look at it later today. Hopefully it will provide some answers since it mentions cryogenics...