in case of a cockpit fire, smoke goggle can enable the pilot to safely see until he can land the plane. In the event of a fire, smoke can prohibit the pilot from seeing at all.
yes plus can also book flights for other airlines affiliated with united airlines. most airlines these days will let u call to book flight but i heard that it costs u to do it and it free online.
They do math in the ticketing field of course! Some of them often end up in cargo handling, they calculate and assign where would this baggage go to help balance the plane how much fuel is needed and...