A towable personal flotation device (PFD) is provided that includes a rudder attached to the device so as to extend into the water when the PFD is towed through water. The rudder is positioned, relative to the direction of travel, such that water flowing across the rudder imparts a lateral force to the rudder, causing the PFD to follow a parallel course. Methods are also provided, for delivering the personal flotation device to a person in or across the water.