We have surveyed the inner 5 \arcmin of the Orion Nebula by means of H \alpha and [ NII ] Fabry-Perot imaging spectroscopy to present a kinematical study of the Herbig-Haro objects in the nebula .
The objects studied in this work are HH 202 , 203 , 204 , 529 , 269 and other associated features .
For HH 202 we find new features that , because of their high velocities ( up to 100 km s ^ { -1 } ) indicate the presence of an outflow that probably is a HH flow not catalogued previously .
HH 202 could be only a part of this larger outflow .
Large internal motions are found in the fainter regions of HH 203-204 , as well as evidence of transverse density gradients that could account for the asymmetry in the brightness distribution of HH 204 .
We report for the first time a high blueshifted velocity ( - 118 km s ^ { -1 } ) associated with HH 204 , and show that the apex of HH 204 is indeed the zone of maximum velocity , in agreement with bow shock models .
We also studied the radial velocity field of HH 269 finding features associated with the HH object .
From our studies , we find kinematic evidence that suggests that HH 203-204 and HH 202 are part of a big ( \sim 0.55 pc ) bipolar HH outflow .