The FMC in the 400 is pretty much standard across the entire Boeing fleet with some minor differences. Theres not direct to nearest airport, but theres a wealth of info available when loading up an approach. If the crew didnt load the approach and/or fly it, that would be the first I've ever heard of that.

This particular airport isnt in the FMC database for my company's 747-400s because we never go there; each airline loads its own databases with the airports they fly to since the 747-400 memory is very limited unless they bought the Boeing upgrade. If the airport wasnt contained in the database they'd have to fly the approach without any FMS/FMC data (raw data ILS, for example). However I think Atlas does go to this airport alot so they probably had it.

Anyway, Im actually shocked as to how many people are trashing these guys for what happened. Its a learning experience for the rest of us, but theres no need to kick these guys while theyre down.