I estimate he was 2° off course to the right, provided he was following the 92° M course towards TPI on the VOR DME Rwy 09 approach.
Being 2° off course (which is not a lot on a VOR track so close to the VOR itself) can be explained by VOR deviation either at the VOR itself or in the aircraft, dialed in the wrong course, being off course due to wind, less precise flying, or flying 'visually' towards an imagined runway in less then optimal visibility.
Niner Mike.
Last edited by Niner_Mike; 15th May 2010 at 15:45.