Well, I'm going on the information I have.
In terms of the damage model, it functions 1-1 but the whole damage scheme has to be considered carefully. Simply going through books and plugging in values would result in something like four LWT's to kill a SW and like 15 to sink a OHP.
Clearly, the "real" values aren't very helpful when it comes to warheads other than a guide to relative in-game effects, which is all that matters.
If you are going through our database looking for numbers ripped from Janes, etc. you aren't going to find them, partially because its not interesting and partially because its not helpful.
There are probably thousands of difference between our database and say a Janes book.
Plugging real-world values into a database and calling it "realism" work is the lowest form of modding, IMHO.
Cheers,
David