Risk of GPS loss - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 112 Old 01-23-2007
Senior Member
 
Join Date: Nov 2006
Posts: 318
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
If you get lost, just pull in somewheres and ask directions!
Sorry, had to.
Loran is still up too, for near shore stuff.
wildcard is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 112 Old 01-23-2007
Senior Member
 
Join Date: Nov 2006
Posts: 242
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Indicating that one has the ability to do something might ruffle a few feathers, but it is not as intimidating as IEDs or suicide bombers that one can't see until it is too late. Brinkmanship wasn't invented in Peking.
tigerregis is offline  
Quote Quick Reply Share with Facebook
post #13 of 112 Old 01-23-2007
Member
 
JouvertSpirit's Avatar
 
Join Date: Oct 2006
Location: Panama City Beach, Florida
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Quote:
Originally Posted by T34C
You have got to be kidding. We didn't even have GPS then. Or the guided missles [sic] to shoot down a satelite [sic].
Perhaps you would like to back up your statement with some references as to the GPS time line.

Pearson 10M.
JouvertSpirit is offline  
Quote Quick Reply Share with Facebook
post #14 of 112 Old 01-23-2007
tdw
Super Fuzzy Moderator
 
tdw's Avatar
 
Join Date: Oct 2006
Location: Sydney Australia
Posts: 17,078
Thanks: 20
Thanked 125 Times in 116 Posts
Rep Power: 10
     
Quote:
Originally Posted by Giulietta
oh my God...the russians are coming...the russians are coming....

Chil out.....we still have to wait for the US to Invade France...
Russians, aren't they good guys now ? You know, like Tony Blair's newest bestest friend Muamar Gadaffi. The Chinese, on the other hand are vicious commo dictators .......Yeah, yeah, I know G, "chill out TD". You'd be right and my hearts just not in it today. I'm going back to sleep.

Andrew B (Malö 39 Classic)

“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett.
tdw is offline  
Quote Quick Reply Share with Facebook
post #15 of 112 Old 01-23-2007
Senior Member
 
poopdeckpappy's Avatar
 
Join Date: Jul 2006
Location: San Diego
Posts: 6,471
Thanks: 39
Thanked 43 Times in 37 Posts
Rep Power: 12
     
Quote:
Originally Posted by Giulietta

Chil out.....we still have to wait for the US to Invade France...

Then where are we gonna get our fries ??
poopdeckpappy is offline  
Quote Quick Reply Share with Facebook
post #16 of 112 Old 01-23-2007
Senior Member
 
Valiente's Avatar
 
Join Date: Jun 2006
Location: Toronto
Posts: 5,491
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 11
   
Quote:
Originally Posted by sailingdog
If the Chinese start shooting down GPS satellites, then small islands in the south Pacific might be the best place to head to...and having your sextant along is probably a good idea.
Astra IIIB, Freiberger Drum Sextant, an NC-77 celestial calculator, everything Bowditch and Mary Blewett ever wrote and lots and lots of plotting sheets live aboard.

Let's face it, unless you like to pretend you're in a private episode of "Star Trek", once offshore, you can get in valuable mental time plotting and fixing via sextant and DR. By all means *confirm* if you want via GPS (unless the BBC tells you some ******* war has broken out), but the pleasure of navigating to a distant port via celestial is not to be sneered at. I personally quite enjoy using even a simple hand-held compass to take bearings and to determine my speed without reference to the knotmeter (the impeller is often fouled) or the GPS. Keeps my mind alert.
Valiente is offline  
Quote Quick Reply Share with Facebook
post #17 of 112 Old 01-23-2007
Senior Member
 
JagsBch's Avatar
 
Join Date: Jan 2007
Posts: 371
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
I just watched a special on Nova, Norwegian Ronald Amundson 1903 journey in the arctic. His compass was useless at the poles, with only his sextant, Amundson was the first explorer to cross the Northwest Passage. Amundson was also the first explorer to reach south pole.

Between the Chiness shooting down satelites and impending polar shift on the horizon thrashing our GPS and compasses, how on earth can anyone find comfort sailing off into the blue without a sextant?
JagsBch is offline  
Quote Quick Reply Share with Facebook
post #18 of 112 Old 01-23-2007
Banned
 
Join Date: Apr 2006
Location: MS Gulf Coast
Posts: 711
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 0
 
Isn't GPS used by everyone, worldwide? If anyone wants it down, they have much worse in mind (but I imagine they'd rather use own own system against us) and I'd have to agree being at sea might be safer in general. Working the mind with older methods is a great way to stave off cruisheimers, and keeps one sharp in the event of systems failure. Doesn't make sense to down GPS anyway. Our armed forces would simply revert to the previous methods using laser guidance and continuous calculating impact computers, as used in the first Gulf War....plenty accuracy there. If nothing, GPS could be the space-based "Twin Towers" symbolically speaking, so I'm glad the gov't opted to beef up Loran, instead of shutting it down.
seabreeze_97 is offline  
Quote Quick Reply Share with Facebook
post #19 of 112 Old 01-23-2007
Senior Member
 
Join Date: Jun 2006
Posts: 2,394
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 12
     
Jovert...
" beginning with the Transit system in 1965, which was developed to meet the navigational needs of submarines carrying Polaris nuclear missiles. These submarines needed to remain hidden and submerged for months at a time, but gyroscope-based navigation, known as inertial navigation, could not sustain its accuracy over such long periods. The Transit system comprised a half-dozen satellites that would circle the earth continuously in polar orbits. By analyzing the radio signals transmitted by the satellites--in essence, measuring the Doppler shifts of the signals--a submarine could accurately determine its location in 10 or 15 minutes. In 1973, the Department of Defense was looking for a foolproof method of satellite navigation. A brainstorming session at the Pentagon over the Labor Day weekend produced the concept of GPS on the basis of the department's experience with all its satellite predecessors. The essential components of GPS are the 24 Navstar satellites built by Rockwell International, each the size of a large automobile and weighing some 1,900 pounds. Each satellite orbits the earth every 12 hours in a formation that ensures that every point on the planet will always be in radio contact with at least four satellites. The first operational GPS satellite was launched in 1978, and the system reached full 24-satellite capability in 1993."

We are not primarily on earth to see through one another, but to see one another through

Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs
cardiacpaul is offline  
Quote Quick Reply Share with Facebook
post #20 of 112 Old 01-23-2007
Senior Member
 
JagsBch's Avatar
 
Join Date: Jan 2007
Posts: 371
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
There are only 24 to shoot down? Size of a large automobile? Talk about a nice target. If you can plot within 1 to 2 miles with a sextant, why on earth would every blue water sailor NOT have a Sextant on board. I am wondering what do you suppose the percentae of cruisers who don't have or know how to use a sextant 25, 50, 75% or greater? To me it has got to be one of the ultimate instruments for peace of mind.

Last edited by JagsBch; 01-23-2007 at 10:13 PM.
JagsBch is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Handheld GPS Overview Tom Wood Seamanship Articles 0 05-31-2001 08:00 PM
GPS Gets More Accuracy Jim Sexton Seamanship Articles 0 05-21-2000 08:00 PM
GPS Gets More Accuracy Jim Sexton Gear and Maintenance Articles 0 05-21-2000 08:00 PM
GPS Gets More Accuracy Jim Sexton Cruising Articles 0 05-21-2000 08:00 PM
Advanced GPS Interfacing Jim Sexton Gear and Maintenance Articles 0 10-07-1999 08:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome