I think the "china syndrome" action is referred to in the config as "submerge" or sub...level or alike.
but I'm not sure if OFP can actually use this as a command/condition etc.
:-\
me think not, or it would of been there (in the comref) in the first place?!
(the stuff I mentioned up there is if your, say custom building needs to be
x cm's sub-ground-level right from mission start (som'n like that).
But many config defines are just... defines, and thus not commands/codes.