You can furl and raise the H21SC main off shore. However, I don't have, but wish I did, another pulley at the base of the mast or cross bar to add a little purchase power to get the head of the sail to the very top of the mast. The manual shows one, but my boat wasn't rigged with one when I bought it...and well, it's on my list of things to do...
Why is it important? Standing under the mast and looking up, you may think that you have reached the top, but when looking from a distance off the boat you might be 6 to 12 inches short. This may not sound like a big deal, and maybe it hasn't happened to everyone, but depending upon the type of luff track you have at the top of the mast (aluminum or plastic), it is a big deal. My experience in the past with the plastic luff track has resulted in the sail pulling out from the luff track and getting jammed...meaning you need to lay the boat over on it's side to clear it. Another contributing factor is the type of line you use for the halyard. Some stretch more than others. Here's a pretty good guide that tells the story. http://www.westmarine.com/webapp/wcs/stores/servlet/WestAdvisorView?langId=-1&storeId=11151&catalogId=10001&page=Running-Rigging-Fibers
Overall the SC is a GREAT boat, and once you upgrade or pre-plan for the above you should have no issues. Furl the sail around the boom, and your tramp is clear w/o fear of the crew stepping all over it. Plus on the SC you also have a forward tramp, a cabin and ample hull storage for storing fishng gear, or pvc rope ladders to aid in beaching of the boat.
Hope this helps.