  Neutrinos are among the most abundant particles in the universe, nearly
massless, travel at speeds near the speed of light and are electrically
neutral. Neutrinos can be generated through man-made sources like particle
accelerators or by natural sources like the sun. Neutrinos only interact via
the weak force and gravity. Since gravitational interaction is extremely weak
and the weak force has a very short range, neutrinos can travel long distances
unimpeded through matter, reaching places inaccessible to GNSS (Global
Navigation Satellite System) signals such as underwater locations. The main
objective of this work is to sketch an early high-level design of a Neutrino
PNT (Position, Navigation and Timing) mission and analyze its feasibility for
submarine navigation since there is a need to improve current navigation
technologies for submarines. The high-level preliminary concept proposes
Cyclotrons or Linear Accelerators based on the physical process Pion Decay at
Rest as neutrino sources. For detecting such isotropic neutrino fluxes user
equipment must be composed of a high-performance clock synchronized with the
system, a detector and possibly additional sensors such as IMU (Inertial
Measurement Unit). A feasibility analysis of the recommended system option is
performed based on simulations for determining the neutrino detection rate and
on a PNT tool to estimate the PNT performances. Although the submarine
navigation application is in the limit of being feasible with current
technology, it could be realized with some important but reasonable progress in
source and neutrino detector technology.
