Diana II’s classic funnel makes her instantly recognisable, but rather than a vintage statement, it supported an exhaust afterburner to eliminate soot particles from raining down on the tenders. Other innovations requested by her original security-conscious German owners included an air-treatment system, a helipad and a custom audio system. Later named Dianamara and Nara – when owned by a former Prime Minister of Lebanon – her next owner had the stern remodeled for better water access and renamed her Kingdom Come. Now Sanoo, this 9-stateroom yacht returned to Feadship in 2018-19 for new decks and a mechanical update.