If you want an elaborate showstopper of a ceremonial barge, you want the right designer. Thus, when Frederick Prince of Wales had his built in 1732 he didn't put a boat-builder in charge. Instead, he engaged William Kent: the architect and painter had recently designed the interior of Chiswick House. Kent would use similar motifs on the barge, carved by James Richards, Master Carver to the Crown.
Presumably John Hall, who actually built the barge, managed to guide the design in the direction of river-worthiness despite the elaborate gilding and decoration. 22 oarsmen rowed it, in costumes designed by Kent, and even their oars were decorated with painted designs. They conveyed Prince Frederick and his family on both official engagements and pleasure trips.
Frederick died in 1751 without ever becoming King, but his barge did reach the highest level: it was used as principal royal barge until 1849. The barge is now on display in the National Maritime Museum, Greenwich; alongside rather than upon the Thames, it still attracts admiring attention.