We report a new set of diatomics-in-molecules potential energy surfaces and electronically adiabatic couplings for the process Na(3p 2P)+H 2→Na(3s 2S)+H2. The surfaces of our previous paper [D. G. Truhlar, J. W. Duff, N. C. Blais, J. C. Tully, and B. C. Garrett, J. Chem. Phys. 77, 764 (1982)] are improved by employing a new parametrization for the 3Σ+ diabatic potential energy curves of NaH. The 3Σ+ diabatic Hamiltonian matrix Hn is based on small-basis-set valence-bond calculations for H12n, and the diagonal elements are adjusted to yield accurate 3Σ+ adiabatic potential curves. The new surfaces are compared to the recent ab initio results obtained by the coupled-electron-pairs approximation [P. Botschwina, W. Meyer, I. V. Hertel, and W. Reiland, J. Chem. Phys. 75, 5438 (1981)], and the comparison indicates good agreement between the semiempirical and ab initio surfaces.