Ah, yes - this is perhaps why I asked the question in the first place.
The "yacht" is one of those items in my own current divorce that my soon-to-be-ex-wife's lawyer has been making much of in the financial settlement negotiations. However, whether "luxury yacht" or "humble boat" the fact remains is that my STEW has never contributed to her either a penny or the merest effort in maintenance. Having originally given her utmost enthusiasm to the purchase, and constantly beladen her with all manner of her clutter (now removed) she is and will remain my own "luxury" - while of course being accounted for as a "joint asset" in the financial split .