Bobbing amid midcentury houses on stilts, in a secluded part of Copenhagen Harbour, Lisbeth Juul and Laust Nørgaard’s compact floating home cuts a dramatically modern profile. Nautical references are kept to a minimum, but a few touches nod toward the home’s habitat. A Rais wood-burning stove recalls a ship’s furnace; soft green and blue fiberglass Eames chairs echo the color of the sea, which is a constant presence thanks to floor-to-ceiling glass doors. The custom dining table sits beneath a sculptural Titania pendant by Alberto Meda. Their yellow Labrador, Buster, rests next to a Hay sofa.