I am wondering any comercial pilot in the real world here. I am longing

for someone known the questions below can give me the answers.

Q1. Is there any GPS system on 747-400 or A3XX series? Cause i played

Microsoft Flight Simulator 2002 for a long time, and found i can't flight

by myown withought GPS system. I know how to use VOR and ILS to

make the approach, but it not always success.

Q2. How many airlines should a comercial pilot fly? Does only the FO fly

one airline through out his training?

Q3. I know there is a trim wheel to make adjustment of pitch. But, is

there any equipment on board can correct the effect of wind shear

continualy without keeping feet on the padal?

When i was landing, i always encountered that problem of the wind

shear. So, i had to keep my feet on the padal to keep the deviation

being corrected through the landing sequencing.