"She" (她) for inanimate objects in Chinese(?)
No, referring to ships and nations as female is an English thing. If you see that being done in Chinese, the writer must be under too much English influence. By the way, if I remember correctly, ships and nations are fererred to as male in Russian.

Edit

I believe you can find a lot of examples that use "她" to refer to various things, but still it's not common practice. In fact, using "她" to mean "she" was not introduced into Chinese until very recently, just a little more than a centuary or so, when Chinese people started to get familiar with western culture. Today most Chinese people are quite comfortable with this character for referring a female person, but the infiltration is not complete:


you would still encounter people (especially elder ones) who use "他" to refer to both male and female people; 
while there are "她" and "妳", the character "您" still doesn't have a female counterpart;
it is used for referring to a female person, not an object, in most cases;
"她" and "他" are pronounced exactly the same, so are "妳" and "你", so the distinction doesn't exist in oral Chinese.


Furthermore, this really is a cultural matter. When an American says "my country" I believe he/she must have a motherly figure in mind, but to most Chinese people, the word "祖國" just doesn't give them the same feeling.