FUTURE NEUTRINO TELESCOPES

We briefly review the four major high energy neutrino telescopes currently under construction and the motivation for their construction. Progress is such that several instruments with muon detection in the 10(4) m(2) class should be operating in the next several years. Plans are advancing for an international consortium to propose a km(3) scale instrument. We highlight a newly identified experiment which may be carried out with such an instrument, if there are substantial numbers of neutrinos in the PeV energy range, as are indeed predicted from same AGN models. The idea is to search for what we call ''double bang events'', which contain a PeV cascade followed by a charged particle track and then a second and larger cascade separated by about 100 m. This appears to be a nearly background free signature for charged current tau production and decay, and would constitute strong evidence for nu(tau) oscillations, and thus mass. We discuss possible sources of nu(tau)'s, backgrounds for these events, both few, and implications of such detetion.