Moonen launches 42-meter megayacht "Sofia" Moonen celebrated a significant launch recently and that was for the 42-meter megayacht "Sofia", a fully custom yacht catering to the whims of the desiring owner. Sofia is so custom a megayacht that as the project was being built the owner was still making changes and alterations to the build. You would remember the original project was extended a couple feet to it's current length to accommodate the owner's desire to have a three-person (two guests and captain) submarine onboard. The submarine itself is by U-Boat Worx. On the inside, entertainment will be top-notch with the extensive custom video server and custom multi-interface controls via Ipad for window treatments, lighting, interior control of the climate. If this wasn't enough, the interior of Sofia, like many other Moonen yachts is by the artful Art-Line Interiors.