Hey there!
Great question! In the real world of general aviation (GA), when you're flying VFR (Visual Flight Rules) and receiving flight following services from a center, it's essential to keep them in the loop about your actions, especially when you're about to switch frequencies for approach and landing. The communication between you and the center ensures safety and coordination in the airspace.
When you're nearing your destination and are ready to switch to the airfield frequency, you should inform the center by stating your intentions. A typical phrase would be something like this:
"N12345, 10 miles southwest of ABC Airport, request frequency change to ABC Tower"
The controller will then either approve your request or provide you with additional instructions. An example of a positive response would be:
"N12345, frequency change approved, squawk VFR, have a good day"
It's important to notify the center of your intentions because they need to know that you won't be responding to any more contacts. If you don't inform them and simply switch frequencies, it could lead to confusion or even a potential safety hazard as they might assume you are still within their area of responsibility.
FSim ATC, though a useful tool for practice, isn't always a perfect representation of real-world procedures. In reality, communication between pilots and controllers is crucial, and keeping them informed of your intentions helps maintain proper airspace management and safety.
So, to answer your question, yes, you should notify the center when switching away for approach/landing. It's part of maintaining clear communication and avoiding any misunderstandings that could lead to unnecessary alarms or potential incidents.
I hope this clears up any confusion. Safe flying!