It means to return, turn, turn, turn, flip. It generally refers to moving, turning or turning taking advantage of the help of the wind (in Marinería y Náutica).
Luff: turn, turn, bend, or turn a boat with the help of the wind at angles with the direction of the bow.
LUFF: BEND OR MOVE OR MOVE THE TAJAMAR OR BOW TOWARD THE DIRECTION WHERE THE WIND COMES FROM.