The θ-dependence of the H2 + Ag(111) SRP48 PES is shown for molecular configurations centered on a bridge site (X = 1/2a; Y = 0), φ = 90◦ and rb = 1.27 Å, where a is the surface lattice constant. Full lines: interpolated PES; symbols: DFT results. The values of Z corresponding to different curves and sets of symbols are provided with matching color.