  A possible detection of ultra-high-energy neutrinos has been attempted since
decades through the Askarian radiation and different observation techniques. In
fact, when such energetic neutrinos interact in a medium are able to produce a
thermo-acoustic effect resulting in a bipolar pressure pulse that carries a
portion of the energy generated by the particle cascades. This effect can be
observed in atmosphere looking for the correlated radio emission and in
ice/water searching directly the acoustic pulse. The kilometric attenuation
length as well as the well-defined shape of the expected pulse favors a
large-area-undersea-array of acoustic sensors as a possible observatory.
Previous efforts of taking data with a undersea hydrophones array were obtained
thanks to already installed submarine military arrays or acoustic system built
to calibrate the positions of Cherenkov light detector units. In this
proceeding we propose to use the based but not operative offshore oil rigs
powered platforms in the Adriatic sea as the main infrastructure to build an
acoustic submarine array of dedicated hydrophones covering a total surface area
up to $\sim$10000 Km$^{2}$ and a volume up to $\sim$500 Km$^{3}$. A future
identification of neutrino events at energies greater than 10$^{18}$ eV will
confirm the presence of powerful accelerators in our Universe able to emit
cosmic rays up to ZeV energy range.
