This paper present first results of a study, on the determination and use of the deviations of the vertical for obtaining an accurate
geoid in Romania, as a future goal. For the beginning, the study occurred on a limited area of about 22000 km2 in the south part
of Romania, including the capital Bucharest. We used data from three different sources: historical astro-geodetic deviations of the
vertical (before 1990), deviations derived from two global geoid models (Gravity field and steady-state Ocean Circulation
Explorer – GOCE and Earth Gravitational Model 2008 – EGM2008) and present astro-geodetic deviations. Present deviations
was obtained using three different instruments, one astronomical and two geodetic. Inside of the study we perfect a new
procedure for the determination of the astro-geodetic vertical deviation, adapted for modern geodetic instruments. The results and
comparisons made offers insight into the possibilities of obtaining and using vertical deviations, as well as an estimate of their
quality in terms of precision and accuracy.