Regular real solutions of the Kadomtsev-Petviashvili 2 equation..

We discuss how to select scattering data generating physically relevant (real nonsingular) solutions of the KP-2 in the $\bar\partial$ approach (generating spatially localized solutions) and in the finite-gap approach (generating pariodic solutions). In particular it will be shown, that in the both cases the direct and the inverse scattering transform for the Lax operator are regular without the small norm assumption.