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NAOMI is the AO system of the 4.2-m William Herschel Telescope on La Palma. It delivers an AO-corrected image to a lenslet array at the focal plane of the optical integral-field spectrograph OASIS. The resulting 1100 spectra are imaged onto a high-QE, low-fringing MITLL3 CCD. A range of spectroscopic and spatial (0.09-0.42 arcsec/lenslet) configurations is available. At wavelength similar to 0.7 mu m, the NAOMI-corrected FWHM is typically half that of the natural seeing. Scheduled OASIS observing began in semester 200413, with 9 programmes awarded a total of 26 nights during the first year of operation. A Rayleigh laser guide star is under development, with first light expected summer 2006. In conjunction with NAOMI/OASIS, this will provide a unique facility: AO-corrected optical integral-field spectroscopy anywhere on the northern sky. (c) 2005 Elsevier B.V. All rights reserved.