I have two on board and use one extensively for drift fishing. Usually tied to the bow but occasionally I will put out two, one from the bow and one from the stearn and drift abeam to the wind but this is in fairly calm seas for fishing. The one on the bow certainly keeps you into the wind nicely in case of a motor failure and have only read about using them from the stearn in a severe following sea. Cheap insurance IMHO.
Allan & Ann
If your floatin' your boatin'!!!