The dipole moment of NO(B (2) Pi) was determined for the first time by high resolution laser-induced fluorescence molecular beam spectroscopy. Specific values obtained areas follows: mu(upsilon' = 3) = 0.293(3) D, mu(upsilon' = 4) = 0.276(9) D and mu(upsilon' = 5) = 0.261(7) D. An RKR analysis allowed the first two moments of the dipole moment function to be derived. Quantum beats were observed for the f-parity Lambda-doublets and the partial resolution of the hyperfine structure allowed the hyperfine energy level ordering to be determined. Accurate molecular constants were also obtained for B(upsilon' = 4 and 5) levels.