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16-10-2020, 23:55
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#16
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Registered User
Join Date: Jan 2010
Location: Southern California
Boat: 1979 Union Polaris 36'
Posts: 333
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What if a lightning strike destroys instrumentation?
When was that photo?
I can say its old... they haven’t wore those uniforms in a long time.
But, that is my chart table. That sextant never came out of the box for navigation for November Mike Tango Zulu between 1994-1997.
And my seat is right to the right behind the camera...
Funny when people can just Google stuff...
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17-10-2020, 00:15
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#17
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Registered User
Join Date: Jan 2010
Location: Southern California
Boat: 1979 Union Polaris 36'
Posts: 333
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Re: What if a lightning strike destroys instrumentation?
More frustration... ask for an opinion... then attack that opinion...
My opinion, then don’t ask.
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17-10-2020, 00:20
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#18
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Registered User
Join Date: Dec 2009
Location: Australia
Boat: BUILT!!! Roberts Mauritius 43ft
Posts: 3,561
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Re: What if a lightning strike destroys instrumentation?
Quote:
Originally Posted by Fortytwo
More frustration... ask for an opinion... then attack that opinion...
My opinion, then don’t ask.
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Is that comment meant for me? If it is then I point out I'm not attacking anyone's opinion!!
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17-10-2020, 00:23
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#19
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Registered User
Join Date: Dec 2016
Location: Somewhere in French Polynesia
Boat: Dean 440 13.4m catamaran
Posts: 2,333
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Re: What if a lightning strike destroys instrumentation?
we carry paper charts although they haven't been updated in ages...i can live with that
we don't carry sextant etc (also don't carry spare horseshoe nails or hoops for the water barrels or other museum items) but we do carry 2 or 3 spare GPSs
(and yes, i have taken ships around the world using celestial nav long before gps...even before loran)
cheers,
__________________
"home is where the anchor drops"...living onboard in French Polynesia...maintaining social distancing
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17-10-2020, 00:29
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#20
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Registered User
Join Date: Dec 2009
Location: Australia
Boat: BUILT!!! Roberts Mauritius 43ft
Posts: 3,561
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Re: What if a lightning strike destroys instrumentation?
Quote:
Originally Posted by Fortytwo
When was that photo?
I can say its old... they haven’t wore those uniforms in a long time.
But, that is my chart table. That sextant never came out of the box for navigation for November Mike Tango Zulu between 1994-1997.
And my seat is right to the right behind the camera...
Funny when people can just Google stuff...
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It came from this article
https://www.usni.org/magazines/proce...ctronics-alone
But th US Navy does have sextants as backup in the event the GPS satellite becomes inoperable.
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17-10-2020, 00:36
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#21
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Registered User
Join Date: Jan 2010
Location: Southern California
Boat: 1979 Union Polaris 36'
Posts: 333
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Re: What if a lightning strike destroys instrumentation?
I drove the USS November Mike Tango Zulu... you read an article.
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17-10-2020, 01:12
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#22
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Registered User
Join Date: Dec 2009
Location: Australia
Boat: BUILT!!! Roberts Mauritius 43ft
Posts: 3,561
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Re: What if a lightning strike destroys instrumentation?
Quote:
Originally Posted by Fortytwo
I drove the USS November Mike Tango Zulu... you read an article.
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Whatever.......
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17-10-2020, 01:24
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#23
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Registered User
Join Date: Dec 2019
Posts: 169
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Re: What if a lightning strike destroys instrumentation?
We had paper charts and Mary Blewitts celestial navigation book. The reason is were long distance sailing and a lightning strike would have wiped out a chartplotter and everything eletrical. One thing you can do is the oven acts a Faraday cage so put everything electical in there. We were sailing in the Caribbean and had a lightning strike 40 feet in front we had Elmos fire in the rigging
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17-10-2020, 06:57
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#24
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Moderator
Join Date: May 2012
Location: At sea somewhere in the Pacific
Boat: Jeanneau Sun Fast 40.3
Posts: 6,346
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Re: What if a lightning strike destroys instrumentation?
we lost all our instruments ot lightning - fortunately we had put PCs, small radios with GPS and other things in the oven. But we do carry paper charts and yes - a sextant
Many laugh at us
__________________
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Our books have gotten 5 star reviews on Amazon. Several readers have written "I never thought I would go on a circumnavigation, but when I read these books, I was right there in the cockpit with Vinni and Carsten"
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17-10-2020, 08:10
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#25
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Registered User
Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 4,229
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Re: What if a lightning strike destroys instrumentation?
I carry a sextant and sight reduction tables because I enjoy using them. I am not, however, conscientious about a timepiece. If it hits the fan I’m stuck with noon shots and “running down a westing/easting” because the method of lunars is above my pay grade.
If you carry the old tools because you’re worried about lightning killing all electronics, do you have a mechanical chronometer that is kept set and for which you know the rate?
On a passage our phones, the handheld VHF, and the handheld GPS are all off and stowed (usually in different locations) and all have the capability of telling us where we are (and what time it is).
I do carry paper planning level charts, again because I enjoy them, and a very good paper atlas of the world, but I no longer carry much in the way of paper coastal or harbor charts.
YMMV
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17-10-2020, 16:20
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#26
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Registered User
Join Date: Jan 2010
Location: Southern California
Boat: 1979 Union Polaris 36'
Posts: 333
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Re: What if a lightning strike destroys instrumentation?
Quote:
Originally Posted by coopec43
Is that comment meant for me? If it is then I point out I'm not attacking anyone's opinion!!
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No.
And you are correct. The US Navy still carries sextants.
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18-10-2020, 16:32
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#27
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Registered User
Join Date: Dec 2009
Location: Australia
Boat: BUILT!!! Roberts Mauritius 43ft
Posts: 3,561
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Re: What if a lightning strike destroys instrumentation?
Have GPS, Digital Charts, and Radar Replaced the True Art of Navigation?
https://www.practical-sailor.com/saf...oatMaintenance
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18-10-2020, 17:23
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#28
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Moderator
Join Date: Jan 2010
Location: Minnesota
Boat: Tartan 3800
Posts: 4,759
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Re: What if a lightning strike destroys instrumentation?
26 replies and no one has pointed out that pilotage and dead reckoning are primary skills that are more important than celestial navigation.
You use celestial navigation to find, say, Bermuda or the Marquesas if you lose all your electronics on a passage to one of those places.
You use pilotage and dead reckoning to find your way to the harbor at Luperon or to get through the Exumas on your way to someplace where you can get parts.
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18-10-2020, 17:37
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#29
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Registered User
Join Date: Jan 2011
Location: Caribbean live aboard
Boat: Camper & Nicholson58 Ketch - ROXY Traverse City, Michigan No.668283
Posts: 6,353
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Re: What if a lightning strike destroys instrumentation?
Quote:
Originally Posted by Fortytwo
More then one GPS... “just in case”... and always paper charts...
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Agree!
We have four GPS devices on board and a spare bare basic old charter.
You can buy a couple nice hand helds for the cost of a sextant. Keep them in a safe place. Also, disconnect both positive and negative leads to any important device before a storm. I installed double pole switches on all and pull all antenna leads.
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18-10-2020, 17:41
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#30
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Registered User
Join Date: Mar 2012
Location: Vessel in Transit
Boat: Coast 34
Posts: 199
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Re: What if a lightning strike destroys instrumentation?
Electronics failing during lightning strikes, how about LED lights they are all electronic and I don't put my cabin or nav lights in the oven. Any first hand experience from Florida or Panama sailors?
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