I'm not going to try and explain the ratings but don't be put off by a boat designed 'for charter'. I would say the hulls of all Beneteaus (any many name production boats) are built to the same standard. Designed for charter doesn't make the boat weaker, it just means it'll have 4 double cabins, 3 heads, hot water
transom wash, etc, etc - all the 'nice' comforts that charterers expect but that are not necessary for extended cruising
(although still nice to have
). And if you think about it, charter areas (Med, Caribbean
, Whitsundays, etc) all cop strong wind
and wave conditions that require a well found vessel. I wouldn't let 'designed for charter' put you off.
The ex charter boat that I bought was built like a brick shithouse (category A- Ocean) - very thick monocoque glass hull
, oversize rigging
, good quality spars, etc. but it's layout was designed for charter.
Look at the end of the day, thousands of Beneteaus, Jenneaus, Bavarias, etc have crossed oceans safely. If we all had a million to spare, we could buy serious quality ocean going vessels like Halberg Rassy or Buizen, but really safe sailing (including crossing oceans) is more up to the skipper
than the boat.