Helicopter searching for <a href="https://en.wikipedia.org/wiki/groundwater" class="extiw" title="en:groundwater">groundwater</a> near Tilst, Denmark
<a href="//commons.wikimedia.org/wiki/User:Villy_Fink_Isaksen" title="User:Villy Fink Isaksen">Villy Fink Isaksen</a>
<span class="int-own-work" lang="en">Own work</span>   and  <a rel="nofollow" class="external free" href="http://videnskab.dk/teknologi/danskere-finder-vand-i-indien-med-besynderlig-helikopter-teknologi">http://videnskab.dk/teknologi/danskere-finder-vand-i-indien-med-besynderlig-helikopter-teknologi</a>