eLORAN

[Mark Fancher]

USAF was using celestial navigation on aircraft up into the 90s I believe. Special sextants that penetrated the top of the fuselage. 


> On Oct 31, 2014, at 9:11 AM, Rob Seastrom <rs at seastrom.com> wrote:
> 
> 
> Bowditch's _American Practical Navigator_ is still available for
> download from NGA.
> http://msi.nga.mil/MSISiteContent/StaticFiles/NAV_PUBS/APN/pub9.zip
> 
> Celestial navigation when it's clear and dead reckoning when it's not
> works pretty well on the high seas and has for hundreds of years.
> 
> -r
> 
> Mark Whittington <markwhi at gmail.com> writes:
> 
>> When you say "celestial navigation," do you literally mean using a sextant,
>> can't navigate if it's cloudy celestial navigation?
>> 
>> 
>> 
>> That's a little scary.
>> 
>> 
>> 
>> On Fri, Oct 31, 2014 at 8:41 AM, [[fgentges at mindspring.com]]
>> <[[fgentges at mindspring.com]]> wrote:
>> 
>>          When I worked for the US Navy, I was the navigation policy
>>     officer and I was a strong advocate of LORAN C as a backup for
>>     GPS.  We had an installed base of modern LORAN C receivers on our
>>     ships and the Coast Guard had the installed base of LORAN C
>>     transmitters.  All we had to do was the cost of maintenance and
>>     operation, both which were not that great.
>> 
>>     We would hear of shutting down LORAN C from time to time but the US
>>     Navy would not go along with that.
>> 
>>     Since that the Coast Guard decided to shut down the LORAN C
>>     transmitter sites.  That was a bad policy decision.
>> 
>>     Now the US Navy will have to use celestial navigation as back up. 
>>     They can probably do it but the loss of LORAN C makes it a
>>     speciality of a limited group of naval officers trained at the Naval
>>     Academy.
>> 
>>     Frank K0BRA
>> 
>> 
>>     On 10/31/2014 04:33 AM, Philip Miller Tate wrote:
>> 
>> 
>>                    I thought I'd get this in quick, before André
>>          beat me to it:
>> 
>>          [[www.bbc.co.uk/news/science-environment-29758872]]
>> 
>>          Phil M1GWZ
>> 
>>          Sent from my brain, via my fingers
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>> 
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