I am planning a hard-ish science fiction novel and I was wondering about space ships turning when going at extremely high speeds (in my case .33c). My question is can ships going this speed turn without sending the crew through the windshield so to speak? If its a stupid question let me know because that is just as useful to know. My second question is in regard to time dilation, when things go at higher speeds, time slows down for them, I am wondering if for example with the speed I used above (.33c) would time slow down 33% compared to a non-moving object/observer? And if not how would you calculate it?