RPM BOWFISHING FATHOM ARROW W/ SIREN & SLIDE The Fathom is a point in RPM's All Point System and like all of the APS points it contains a ferrule, body and conical tip, all made of hardened stainless steel. The Fathom body features two 1-3/8' swept barbs. These barbs are always in the "hold" position and are release by twisting the conical tip