LOL, your ram, (and/or sea chart or globe) will only ever work for you and you alone and never benefit the ship as a whole, except where it benefits you, as your cannon shot will be more powerful, in the case of ram usage, resulting in a general, indirect benefit to those on the same ship, because you will theoretically sink ships faster, which is generally a beneficial outcome.
Now it must be noted that I tried to make that last sentence as long and descriptive as possible, while still maintaining some semblance of correct grammar, in an effort to elucidate the concept without obfuscation, all the while trying to create a certain, unnecessary level of confusion ...
You're Welcome!