I think it all depends on wind and tide, when we were in Noeway, we had to use 500g+ pirk (masice thing like a silver banana... ) when wind was against tide.
Also for anyone who is going to norway, SAS has smarttened up, they weigh your hand luggage, get you to put everything into your hull luggage then charge you an hand and a leg for any excess, and they are pretty tight on any excess weight.