They feature the first twisted leading edge full spade rudder (TLKSR) of Becker Marine Systems.

Her underbody has been updated continuously and now features a bow centerboard, twin daggerboards amidships, a canting keel with vertical winglets on the torpedo bulb and a centreline single aft balanced spade rudder.

Linge had become convinced that a slightly smaller boat with a detached spade rudder and short keel could be a fast seaworthy boat with the likelihood of great popularity - though such features were not allowed under the 5.5 rules.

A well built Piver while not as "modern" as new tris will still hold their own and are quite suitable for cruising, especially when modified with a Norm Cross design "fin keel and large area spade rudder".

They are also one of the first American "racer-cruiser" style boats that combine the comforts of a cruising boat with the advantage of a modified full keel with a spade rudder (see photo), like that of the Bill Lapworth Cal 40 designs that revolutionized ocean racing in the mid-late 1960s.