  The tip-tilt stabilisation system of the 1.8 m Auxiliary Telescopes of the
Very Large Telescope Interferometer was never dimensioned for robust fringe
tracking, except when atmospheric seeing conditions are excellent. Increasing
the level of wavefront correction at the telescopes is expected to improve the
coupling into the single-mode fibres of the instruments, and enable robust
fringe tracking even in degraded conditions. We deployed a new adaptive optics
module for interferometry (NAOMI) on the Auxiliary Telescopes. We present its
design, performance, and effect on the observations that are carried out with
the interferometric instruments.
