Quote:
Originally Posted by markdenny
my daughter in all her wisdom says to me why cant they use their phone with the gps to find out where they are just goes to show you kids today have no idea  |
Or it shows that they're right on with their thinking. Sitting on top of the sail while pulling into Pearl Harbor a few years ago I placed my phone next to one of our GPS antenna's, and a handheld next to it. The handheld and my phone showed the exact same position, and the WRN-6 down in control concurred. We then compared those numbers to our last round and they were within a few seconds of the three hybrid fixes we shot.
GPS is gospel if we have a high figure of merit. Also, GPS is what we use to feed a fix into our Inertial nav systems. We can also use bathymetric data to tell us where we're at, but that's Secret.
On the less modern side, are traditional Visual, Radar, and Hybrid type fixes. Using radio triangulation we can also determine our location.
And last but not least, we have the Ol' Sextant. We break it out whenever the NAV is the OOD on the surface, and it's REALLY dead on the Mid-Watch!