I can avoid seasickness only by being out on an open deck, so closed hydrofoils and catamarans are out for me. I have identified 3 ferries from Scotland to NI, but I am not sure what type of vessel is used and more specifically, whether there is access to an open air deck. The 3 routes I have looked at are:
Stranraer to Belfast; Cairnryan to Belfast; and Troon to Larne. Can anyone tell me please whether open or closed vessels are used on these routes? Also if anyone is aware of any further routes where open deck ferries are used, I'd be interested to hear. Thank you.