Thank you so much for everyone who took the time to respond, and for helping clear that up. I agree, it's a bit of an odd system and doesn't make it very clear what the time slots are for. I have had a look on the forums and noticed that there can be some issues with the heated loungers being full for long periods, but hopefully it will work out. We have a sea day on the first and last day so I expect those will be the days when we stand and stare pointedly at anyone who has been in a while🤣