The view port is completely missing:
If the view port blew inward first, the implosion would have been lessened.
There wouldn't have been much left of the person immediately behind the view port.
It sounds like it’s possible the viewing port in front which was not rated for the Titanic depth could have failed and then the rest crushed apart too.
Did I not read that the ?acrylic viewport was seen by passengers/crew to be visibly deforming and buckling inward and outward under the pressure strain on previous dives but the craft continued to be used anyway?
The view port is completely missing:
If the view port blew inward first, the implosion would have been lessened.
There wouldn't have been much left of the person immediately behind the view port.
I used to design pressure vessels for instruments and optics (cameras and lasers). One of the biggest problems is matching properties of different components (dome, body, endcap). It is impossible that the dome wasn’t designed for depth. It is possible that the joint between the acrylic port and the next (spherical) component wasn’t well done. On one camera housing I built the acrylic dome would compress more than the aluminum seat. An oring between the two and lubricant sealed out seawater and let the two compress at different rates. That is,the dome slid on the aluminum. I’ve never experienced fatigue of acrylic and that housing had thousands of dives.
From the pictures of the wreckage I’ve seen the viewing port blew out, not in. The outer retaining ring and fasteners are missing suggesting blow out. The hull imploded, the atmosphere inside the the craft blew the viewport out IMHO.