I think what airtags is saying is that you can't simulate or at least hope to accurately simulate and therefore anticipate the outcome of an accident with an evac in a mock up....
The results extrapolated from mock up evacs can be misleading simply because you can prove anything if you want a certain viewpoint looked at...
In other words you can prove anything with statistics...politicians do it all the time....
I think it was RedTbar that raised the issue of the 320 in the Hudson.If both doors 1 sliderafts had been used they should have been capable of taking all the pax.However,after looking at the video it does look as though one door was opened without the slide at first then reopened with the slide raft deployed....Both doors two were unusable I think because of flooding.
How many cabin crew were there at the front of that 320 when it ditched?
In any situation how can one F/A open,guard and ensure correct deployment and carry out an evac from 2 adjacent doors at the same time?
If this is the case then how can CASA have justified this decision....