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paper charts vs: navionic chips
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thataway



Joined: 02 Nov 2003
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PostPosted: Sat Feb 09, 2008 11:38 pm    Post subject: Reply with quote

This same question comes up peroidically on other forums. Recently on THT--several delivary skippers said that they used paper charts--one didn't. Most professional mariners have paper charts aboard. There is a data base of countries and if they allow electronic charts (March 07). As I read the site, ECDIS is not satisfactory for US vessels, that paper charts are required. For foreign vessels whose country allows electronic charting as primary navigation, redundant plotter, with reduantant power supply, with an appropiate folio of appropiate paper charts are still required. I was discussing this with a friend who skippers a lage tug and he does depend on the electronic charting.

If anything, I find that the electronic navigation lulls folks into thinking how "easy" boating is--and they don't learn the basic skills. But that is just an opinion--and may be biased. What I have noticed is that at one point it seemed like many people were in boating for the "long haul"--mainly because of the learning curve of navigation. Along with the experience in navigation, comes experience which increases the seamanship skills. Again--it is only dependant on the motivation of the individual. I see more people buying expensive first boats, going on a voyage, like the loop, and then getting out of boating.

I don't think that anyone can say that it is not easier to boat, with the new navigation tools. That doesn't mean that people don't still make dumb mistakes.. On the other hand, what good are paper charts if you don't know how to use them?

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Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
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Larry H



Joined: 02 Nov 2003
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PostPosted: Sun Feb 10, 2008 12:30 am    Post subject: Reply with quote

Bob said,

Quote:
On the other hand, what good are paper charts if you don't know how to use them?


I think this is really the question.

If someone is not going to learn how to navigate with paper charts and compass, then having them is not a backup. Those people should do what Dan does, have two or three different electronic navigation devices(chartplotter, computer program, handheld GPS), and learn how to use each of them.

That would provide them with backup security if any one or two goes down.

Dan,
after reading about your setup, I do agree that a chartplotter on 12volt ships power, a laptop on its own battery, and a handheld on internal batteries does provide three independent nav devices. They all depend on the GPS signal, but that is now somewhat stable and reliable.

The electronic devices can have problems with accuracy and I still think folks should learn something about charts;(including true vs magnetic north, age of the data on a chart, and horizontal datum), but redundant electronic charting may be acceptable.

Commercial shipping and ferrys use electronic systems that have a complete second duplicate system up and running at the same time as the primary.

The more you know about the information that determines your safety, the better.

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A C-Brat since Nov 1, 2003
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dogon dory



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PostPosted: Sun Feb 10, 2008 1:11 am    Post subject: Reply with quote

Sorry, Folks - Post Deleted By Author

Last edited by dogon dory on Mon Mar 03, 2008 10:27 pm; edited 1 time in total
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TyBoo



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PostPosted: Sun Feb 10, 2008 1:15 am    Post subject: Reply with quote

Quote:
Maybe old dogs do learn new tricks once in a while.... I stopped and bought a map.



Yes, but are you old enough to remember when maps were free?

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TyBoo



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PostPosted: Sun Feb 10, 2008 1:31 am    Post subject: Reply with quote

Now me, I got paper charts from the south Oregon coast to north Alaska that came with the boat. They are in a box in the house somewhere. A few of them are under the berth cushion in the boat, along with a couple cruising atlases. I also have two stand-alone chartplotters on board and a hand-held GPS that is good for coordinates and little else. About the only reason I carry the charts is so Dusty doesn't catch me without them when I am up that way.

Plus I got one of them Blackberry phones the other day that has a GPS and Google maps and Google Earth and all that nerd stuff. After reading Les' suggestion on another thread to skip the magnetic compass on a new boat I am thinking about taking the Ritchie out so I have room to put a stand for the phone. That damn compass can't play music anyway.
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Larry H



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PostPosted: Sun Feb 10, 2008 1:34 am    Post subject: Reply with quote

Quote:
Yes, but are you old enough to remember when maps were free?


Oh yeh, I remember that.
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TyBoo



Joined: 23 Oct 2003
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PostPosted: Sun Feb 10, 2008 1:40 am    Post subject: Reply with quote

Larry H wrote:
Quote:
Yes, but are you old enough to remember when maps were free?


Oh yeh, I remember that.


You didn't even have to buy their two-bit (literally) gasoline to get one, either. If you wanted a window wash, oil and tire check it was best to get a buck's worth of gas, but the map was still free.
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dogon dory



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PostPosted: Sun Feb 10, 2008 2:06 am    Post subject: Reply with quote

Sorry, Folks - Post Deleted By Author

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oldgrowth



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PostPosted: Sun Feb 10, 2008 7:31 pm    Post subject: Reply with quote

thataway wrote:
You can obtain the US topographical charts on CD and DVD. There are some interactive Topographic maps free on the internet, but I don't believe to the extent or detail that the nautical charts are available--maybe Dave has some better information on downloadable or cheap topo maps. To my knowlege Fugawi is one of the best of the topo's at $50 for the entire US at 1: 100,000 scale. I believe that it is considerably more expensive to get the more detailed 1: 24,000 scale maps for each state.

Another good source we haven't really fully explored yet, is Google Earth. I find it very helpful when planning--and even have copied screen shots for areas I want to explore. Also in rivers which are not well charted Google Earth gives some very good information--and one can make up their own charts.


Bob – I use to be able to download the 1:24,000 and the 1:100,000 Topo maps for free on MapTech. It is no longer available and like you I can find several interactive sites with them but not down-loadable for free.

When they were free, you had to select each file individually and down load one at a time. It was too time consuming and too much data so I bought the files on CD. To get the complete set for Washington it cost $90 and had 1415-7.5 minute (1:24,000) charts, 40-30 minute (1:100,000) charts and was 6.76 Gigs in size. Oregon was similar.

The reader cost 20 to 30 dollars. You can zoom in or out and change the scale. You can do anything with them that you can do with nautical charts. You can also view the charts individually or scroll continuously with the charts stitched together.

The Washington maps has a major error in one of the 30 minute maps, so you have to use some common sense when using them, just like the nautical charts, but overall I find them very accurate and useful.

I also use Google Earth a lot but find http://maps.live.com/ to have much better photos than Google Earth, especially in the remote and rural areas.

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Dave
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thataway



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PostPosted: Sun Feb 10, 2008 10:38 pm    Post subject: Reply with quote

Dave,
Thanks to the link to "live maps" I had not seen that one. In many places it is better than Google. It is interesting that at my home the Google Earth is better resolution, but that the aerial photo is 6 months older (I can tell by the progress done on a new home across the street from us)--but on Live Maps, my Daughter's home in Culver City is much clearer than on Google Earth--and also considerably newer than the photo of my home or Google Earth (by remodeling done).

These on line maps/aerials are really interesting. Our county is on GIS and each lot is outlined by the GIS system, the house value, the dates of sale, size and even layout of the houses are available, aerial overlay, and in some cases street level photos of the house are on the country web site.

Dan--definately our thought processes are molded by our experiences. It may depend on where a person boat. as to the degree of skills needed, Today I spent 4 hours (beautiful 73 degree afternoon) on the ICW just watching boaters. One 25 foot boat ran aground, even though there was a GPS antenna on the cabin top. I saw one 18 foot center console come very close to swamping because the skipper didn't handle a wake properly--and on the other hand, the skipper of the 50 foot sport fisher, really didn't have any business running his boat at max wake speed in that perticular congested area. I called him on the radio, warning of an pile driving rig being pushed by a skiff, where his wake would have caused substantial damage, and possiable injury. Fortunately he slowed to minimum wake speed and thanked me. I don't think he recognized the danger. A person can get in a very serious problem between Puget Sound and the San Juans or Marina Del Ray and Catalina, under certain conditions. A lot of safety comes back to common sense, but experience does help.

I have a lot better navigation gear aboard my C Dories than I ever had on any the the boats I voyaged on. Today, I would have exactly the same navigational gear on a 60 foot boat as I would on a C Dory. If I could afford it, perhaps the screens would be bigger, but probably not.
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doc



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PostPosted: Mon Feb 11, 2008 4:32 am    Post subject: Reply with quote

Dan, Is it true in the event of losing all navigation equipment at one time that you will rely on the premise that moss will only grow on the north side of your boat to get you back to Fairbanks?
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dogon dory



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PostPosted: Mon Feb 11, 2008 10:09 am    Post subject: Reply with quote

Sorry, Folks - Post Deleted By Author

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damason



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PostPosted: Mon Feb 11, 2008 10:10 am    Post subject: Reply with quote

You might check the US DOT USCG Navigation Rules (ColRegs 72) Rule # 5 Look-out "Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means ...

I have seen many captains who ran aground because they were navigating by a TV screen. Someone has to be watching where they are going, other boats on the surface of the water, the height of bridges, and the color for depth of water. When you use a paper chart it requires more attention and work to the duties of navigation.

I will take Dave's challenge for navigating anywhere if we turn off the GPS signals vs my paper chart use. In the Gulf of Mexico we always say if you have no means of navigation just sail North and you will find land.

There are city boys who are looking at the tall buildings vs the country boys which are watching where they put their feet.

My boat's name is CHARITY, cause that is where all of my money goes.

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dogon dory



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PostPosted: Mon Feb 11, 2008 12:43 pm    Post subject: Reply with quote

Sorry, Folks - Post Deleted By Author

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patrick and linda



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PostPosted: Tue Feb 19, 2008 10:43 am    Post subject: Reply with quote

my original question dealt with, purchasing one or the other, which system, paper of chip, would provide me with the best possible coverage.
i appreciate the responses, and as a result, have ordered the chip and was actually able to purchase this chip thru a c-brat'r, and at a savings, as well.
so, thanks to all.
have a greta day!
pat
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