first coil means for electromagnetically sensing relative proximity and left and right {HEAD ~ displacement} of {TAIL ~ said projectile} in terms of currents induced by the mechanical motion of said projectile 
of
first coil means for electromagnetically sensing relative proximity and left and right { HEAD ~ displacement } of { TAIL ~ said projectile } in terms of currents induced by the mechanical motion of said projectile
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH