hh88hh88 The newly launched HH88 is the second largest carbon fiber catamaran ever built. Fully customizable with an optional flybridge, deck level owners’ suite, tiller steering, jacuzzi and more.HH88 is a 27-meter carbon fiber catamaran desned by Morrelli & Melvin. It can host up to 10 guests and 4 crew members, and has solar panels, generators and lithium batteries for power.