S.S. Steam Ship see here for that and more..
http://en.wikipedia.org/wiki/Ship_prefix
AFAIK It is a SH3cmndr that picks up the ingame names that are in there but the Dev. team was probably rushed and the names are one of those things already in the game , not coded to show/work in the ingame log amongst other things that are in there but never worked with the stock version.