Will there be an opportunity for my husband to have a go at sailing the yacht? He is an avid sailor, but has only sailed on small yachts. I know he will be keen to have a go at transferring his skills to something a bit bigger.
The sail systems of a large superyacht are far more complex than on a small boat. However, should the Captain be agreeable to it, there is no reason your husband could not have a go ; something that would always be under the direct supervision of the skipper.
Insurance regulations may well dictate that it would not be possible, but it would be down to the individual owner and captain to make the final decision.
It is best to speak to your broker before embarking on a yacht charter and ask them what the likelihood is and how to go about making this particular request happen.