  There is a proposal to send a neutrino beam from the Protvino accelerator
complex located in Russia to the detector facility called `Oscillation Research
with Cosmics in the Abyss' (ORCA) in the Mediterranean sea to study neutrino
oscillation. This is called the P2O experiment which will have a baseline of
2588 km. In this paper, we carry out a sensitivity study to extract the best
possible physics sensitivity of the P2O experiment. In particular, we study the
effect of antineutrino runs, the role of background as well as the impact of
controlling the systematic uncertainties vis-a-vis the statistics.
