It can be a lumpy passage and it can be smooth. So take your wrist bands, they seem to work for some people as does the sticker for behind the ear. You will also be offered tablets by RCI and if you are still bothered by it have the injection, but chances are you won't need them and remember just because you might have felt unwell on a smaller ship or ferry it doesn't follow that you will on a bigger ship and Navigator is big. I've been through Biscay in a force 10 and when it was like glass and I always look forward to my cruises...Neil Dow.
My family and I have recently sailed accross the Bay of Biscay in a Force 8. No problems except I did feel queasy. So take your wrist bands just in case.
Definately take your wrist bands & your seasickness tablets. We were on the NOS in June (loved it) but the 1st night & next day did make me feel quesy although my husband was fine! On way back, it was fine as were going with the waves - not against.
We were on the Navigator this August went over to Ireland didn't even know we were moving.There was a bit of a swell coming back but still didn't even feel the ship moving.The ship is very well stabilised and being so big! So I would be pretty sure you will have a nice crossing through the Bay of Biscay.I get sea queezy and did when we went on P£O through the Bay Of Biscay we were just unlucky and had a force 9 swell(in April) take your sea bands they will do the trick dont be embarressed having them on as you want a good time aboard.Still say you wont know you are sailing best boat I have been on for that. Enjoy your holiday.