Originally Posted by
verticallimit
The list is long of extra purchases when buying new aircraft, there are many options, but is there a grade of the pressurization system.
Or is "hard" decompression controlled by company rules, pilot related or even manufacture related.
Not aware of any cabin pressure controller options in any modern aircraft. Control is typical fully automatic with no crew intervention required unless there is a failure. Older aircraft may require a manual setting of the landing altitude.
Cabin pressure will vary between ambient pressure at takeoff, reduce during climb, be stable in cruise, and increase on descent to equal the landing airport ambient pressure. Different aircraft types may have different cruise cabin altitudes (air pressures) for the same aircraft altitude.