Swirly World In Perpetuity is a small sailboat which has been used by Andrew Fagan to make a series of solo voyages.

The yacht was designed by Gary Appleby, a New Zealand apprentice boatbuilder, and was constructed by Michael Brien, who launched it in 1972.

According to Fagan, Brien was "an all-rounder and used to be a cabinetmaker and [he] had made an immaculate job of [building] the boat.

[1][2] In 2007, Fagan completed a 3,000 km circumnavigation of New Zealand with the yacht, with the route taking in the subantarctic Auckland Islands.

The voyage was anticipated to take 14 months, but 2,600 km into the journey, when approximately halfway between Auckland and Cape Horn, the boat's skeg and then its rudder were lost.