Norway fjord cruises: any danger of getting seasick?

My daughter gets sick from a wide array of motion types and we learned that early on. She can’t even watch 3-D movies. She’s very fortunate that Dramamine does work very well for her … when she’s not too stubborn to take it. She’s done her share of barfing after saying “I’m fine, I’m fine!” Her fun fact is “I’ve barfed on x number of our vacations!” She still loves to travel. I understand, though, that others get no relief from meds.