re-fueling and maintanince c135delta> thanks for the help. I am thinking of a Yacht that is 82m LOA and 16m beam. Draft is a little up in the air, would like it under 6m. The hanger if able to have it would be full beam. I am reading about different aircraft now, as this forum and thread have been most helpful. I have a question for you all! I have been reading about maintanance and re-fueling cirtification for use on Yachts? I take it this is seperate from operational cirtification?