Questions & Mysteries How do you get off the grand line?

How do you get off the grand line?

It is said that going out through the calm belt is impossible due to the lack of wind and the large amount of sea kings

The reverse mountain is against the current, there are no tents or something similar to pull the boat

-It has been seen that the germ comes out climbing the network line

-the warships thanks to the kairouseki

-Rayleigh crosses it swimming fighting with sea kings


What about ordinary pirates?
For example Don Krieg, how did he get out of there?