A novel maize variety designated PH11V0 and seed, plants and plant parts thereof. In one embodiment the target is a mirror and the projector is provided with a transverse scale for measuring the reflected beam. The strained material has a corner above the surface of the substrate. A processing system providing an orientation reference associating the bone to the trackable member comprises a signal interpreter for determining an orientation of the trackable member and of the positioning block from the orientation-based data. With this arrangement, the catheter does not kink or collapse due to the pressure exerted on the catheter wall when the balloon is inflated. The apparatus includes a ten yard marker pole with an attached laser apparatus.