(1) A significant navigational position normally not marked
by the site of a radio navigational aid. When used with
respect to RNAV, it is a pre-determined geographical
position, used for route or instrument approach definition
or progress reporting purposes, that is defined relative to
a VORTAC station position. Two subsequcntly related way
points defined a route segment. This predetermined
geographical position can be defined by latitude and
longitude and/or relative to a VORTAC or VOR/DME reference
facility by magnetic radial bearing and range in nauticaL