Okay guys, you are very knowledgeable on cockpit operations but I think you should identify your terms so we could all appreciate and participate. I am very interested in this issue and are somewhat knowledgeable, but it has been quite a few years since I was in cockpit design and terminology changes with time and with subcontractor.
EFIS - Electronic Flight Instrument System (?)
Cat II - Landing below 200' ceiling but above 100'. Visibility 300 ft.
Cat III - Ultimately zero-zero.
FMS - Flight Management System (?)
Then I am lost.
What is a navigator doing on the modern aircraft?? Is it because foreign operators cannot depend on GPS?
On the B-2, last data entered on separate panels was accepted. Crew is still required work together. But then there was no navigator to argue with. However, there is provisions to add a third station just never required. I am not sure of the status of Cat landings for the B-2, but it has no Head Up Display, something I fought against because of design impact to the crew station and huge cost, basically because the B-2 is a heads down aircraft. The original WAG for upgrading the B-2 to GATM was over a billion dollars.
In my day, waivers were often given on military aircraft for civilian requirements.