That is a good question that I would also like to know about.
I do know that like most things SH4 does things differently from SH3.
Perhaps it is explained in the well written and exaustive SH4 game manual?
Uh no.
Is it a good idea to have a crew of trained specialists dedicated for DC?
Or is it better to have your trained people manning the station and manually swap them out during damage repair?