Why are squawk codes changed in flight?

[MartinRex007 390]

Yes, there are emergency squawk codes:

•1200 Visual Flight Rules (VFR)
•1202 Gliders.
•7500 Hijack.
•7600 Communications failure.
•7700 emergency.
•7777 military intercept code.

[19dcavscout 39]

I have had to change it in real life depending on what I was doing. Usually if I am flying cross country, they won't, but once I get to my destination and want to do some practice approaches or upper airwork the local controller will have me change it. Its not terribly uncommon and really not a huge deal. It does happen in the real world.

Yes, there are emergency squawk codes:

•1200 Visual Flight Rules (VFR)
•1202 Gliders.
•7500 Hijack.
•7600 Communications failure.
•7700 emergency.
•7777 military intercept code.

They say if you want a cool up close and personal airshow, squawk 7500 and wait a bit!!!

[fnav77 56]

You change squawk code sometimes when entering a new area where the ATC system is different and there is no link with the previous sector. Sometimes, also, there can be a duplicate code....

Changing squawk code is a quite frequent occurence.