Hm, lol I've sank so many ships in general (EITC and Navy) and it's late at night I can't recall if I sank a bigger..ETIC ship, I shall try it now :/
Thanks for the suggestion
:/ I just sank like a Level 18 or something big sloop and nothing happened. It says Level 7+... why do I need to attack the ones in their 20s...