Airflo Superflo Max Smooth - Canadian Atlantic Salmon Taper (C.A.S.T)New Formula. New Packaging. The Canadian Atlantic Salmon Taper (C. A. S. T.). Purpose built for the fabled Eastern Canada Atlantic Salmon fishery, where long casts into the wind are just an occupational hazard. But thanks to its moderate front taper and extremely long rear taper, the C. A. S. T. is equally adept at presenting to skittish fish holding in low, clear water.