To "acknowledge" Stu's question: of course this game is not for ship-spotters or experts on ships..
It's a game for anyone..No one has ever complained here that a question is too easy..
Some questions are more difficult than others, but most of them can be found if you want to
I can't deny that to answer some questions a degree of searching-skill is usefull..(you get handy with it in time)
Lot's of questions were too difficult for me to find, some were so hard I thought no-one would know it (but someone often does) I think one of the nice things about this game is that maybe things can be learned that were not known, and an incentive for some to improve their searching skills..
Some questions may be too difficult for anyone to answer, the 2-hour rule takes care of that..
So, in short, the game is for fun and learning..