If you mean negative buoyancy (like NYGM) it’s working fine in LSH3 until you get some damages (even minor)...and then the sub become unrealistically uncontrollable underwater.
That’s why i don’t use it anymore.
Needs some hard work with the LSH3 .zon files that i can’t do myself for the moment.
NYGM was made from scratch with this feature. Not added after...
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