An attachment for a blade of a playing stick such as a hockey stick. This apparatus is capable of continuously measuring the complex reflectivity at single or multiple wavelengths to a resolution limited by Rayleigh scattering in the waveguide section where the structure is inscribed. Motion vectors are predicted and the encoding of the nonkey frame can omit coding for calculated motion vectors that are sufficiently close to their predicted values and encoding differences between calculated and predicted motion vectors. A system for starting an engine of an electric drive machine is also disclosed.