Sailed from S.W. England to Scotland, back south to Gibraltar, through the Med to Greece and back to South of France. Took us 8 years, our crossing of the Bay of Biscay was so calm we motored all the way until we hit a thunderstorm off the coast of Spain.
So we sailed a very small part of the Atlantic Ocean but a lot of the Irish and Mediterranean Sea in a 35' sail boat. I don't consider our boat to be a large craft but it's not a dinghy either.
Cheers