No-fly in Subsurface?

[Lutz Vieweg]

One additional reason for "yet more safety margin" could be
that "loss of cabin pressure" is, albeight seldom, an event
that can actually happen on a flight.
Question is: Is loss of cabin pressure likely enough to
justify calculating with a much lower ambient pressure
(for the period of time the plane requires to descend to
2400m) for decompression?

Regards,

Lutz Vieweg