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No. Gooseneck/5th wheel trailer connections use what is called a "positive lock" mechanism. It works the same for big-rigs (semi-trailers) as they use the same. The positive lock does not allow for decoupling unless the lock is pulled. If a 5th wheel connection is not properly locked, it will slide back out immediately upon trying to pull the trailer. There are a multitude of reasons why regular ball-and-socket type connections require chains, the majority of them is user stupidity (yes, we all make mistakes). Here is a web page from a company which states pretty much the same.

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  • Thank you so very much for your detailed answer!
    – Maurice
    Feb 22, 2023 at 21:44

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