Originally Posted by
AerocatS2A
I know. It would still a factor leading to the balls up though. Even though it shouldn't be.
Isn't all this FMC stuff just conjecture though? Has there been any confirmation that this aircraft had not been fitted with GPS yet and that it suffered from a bit of map shift?
Indeed it is, like much of the human-factors speculation in this lengthy thread.
What is not speculation, because it was stated early in the thread, that pilots often couple up at ARCHIE (8,000, msl) to this FMS database visual when in the clouds and remain coupled well after clear of clouds and cleared for the visual. This could be as close in as JANYY or perhaps even closer to the TRACON's MVA over the bay, which is 1,600, msl.
The weather minimums are quite complex for a visual: