NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: How Many Chronometers?
From: Lu Abel
Date: 2009 Sep 18, 20:01 -0700
From: Lu Abel
Date: 2009 Sep 18, 20:01 -0700
I wonder if this is current data or "the way we used to do it." My impression is that most US Navy ships have highly electronic bridges these days. In fact, nuclear submarines go underwater for months at an end with NO surface contact; they are totally dependent on electronic navigation (specifically, an inertial guidance system) and I understand that when a sub resurfaces after 60 or even 90 days it's within feet of the location its nav system is giving. As far as EMP is concerned, most military electronic systems are supposed to be EMP-proof. And there's always the option to seal a couple of Garmin GPS's in a metal container as a backup system. Apache Runner wrote: > That's interesting to know. Do you know the reason why? > > My own speculation is that they want to maintain a completely > electronic-free means of navigation under the possibility of some > extreme situation arising. Perhaps in the event of a nuclear EMP? > > > > > --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---