Medical assistant (SM) Interview in a few weeks, help needed

#1
Hello, this is my first post and despite looking through previous posts i still need to clarify what is going to be asked and what i need to revise for my interview.

1. As a submariner I was told I need to know where the submarines are held, which submarines are currently in service, which are out of service, future service???

2. what general knowledge do I need to know about the royal navy??? History etc?

any help would be appreciated and yes I am doing my own research but was hoping to get others ideas through use of this post.

thanks in advance.