The Isotope mast is bow stepped. Boat has two shrounds and one forestay, I hook up the forestay to the bridle and one of the shrouds to an eyelet mounted on the front crossbar. Step the mast, then attach the other shroud to the chainplate, walk around and undo the eyelet shroud and attach it back to the chainplate. Having the little eyelet on the front crossbeam makes all the difference in stability when the mast is going up.