Boats and sailboats models plans various boats and sailboats plans blue prints pdf dxf cdr dwg jpg etc iom class rules hull design models photos us1m us one meter. – international one meter (iom): this is the international class with the fastest-growing fleet in the world. the international class association estimates. Site news & other interest. august 2015: after many years of prototyping and development, i’ve made a limited edition batch of a variable "v" spreader to suit the iom..