FCOM PRO-SPO-51
WITHOUT GPS PRIMARY FUNCTION
RNP accuracy criteria are met, provided radio navaid coverage supports it for: ‐ RNP-1 en route and in the terminal area, provided a required accuracy of 1 nm (See note below) is checked or manually entered in the MCDU.
‐ RNP-0.3 in approach, provided a required accuracy of 0.3 nm (See note below) is checked or, manually entered in the MCDU.
Note: It is possible to enter the radial equivalent to the specified Crosstrack (XTK) accuracy, that is the RNP multiplied by 1.2, the EPE being an estimated radial position error.
Can anyone explain me how i do the note above?