FCS II Al Merrick Tri-FinsFCS II Al Merrick Tri Fins Overview Al Merrick's template is designed for radical, progressive surfing. The raked side fins produce exceptional speed and drive, while the smaller centre fin on the medium and large template offer quick release through turns. Ideal Conditions Hollow steep waves, punchy beach breaks. Board Types Designed to fit the FCS II Fin System. Performance boards with deep concaves and moderate to extreme rocker. Fin Family Carver: