  Surprisingly large polarization in hyperon production by unpolarized proton
beam has been known since long time.
  Huge inclusive hyperon polarization data are available in literature, few
data are disponible on spin observables and none on exclusive hyperon
measurements. Evidence of relevant violation of the OZI rule in several
reactions are also shown in recent measurements.
  These two items, connected together by the hypothesis of existence of a
sizeable $q \bar{q}$ sea in the nucleon, can be studied using the DISTO is a
spectrometer installed in the polarized proton beam of the Saturne accelerator
in Saclay.
  The compact experimental set-up is designed to detect four or more charged
particles signaling $\Lambda$, $\Sigma^{0}$, $Y^{*}$ or $\phi$ production in
$\vec{p} p$ interaction.
  An outline of the physical motivations and a brief description of the
experimental apparatus is given as well as some preliminary results from the
first production running
