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CoPilot 8 GPS - Does it work when out of cell coverage area?

I was thinking about buying the CoPilot 8 GPS software for my T-Mobile USA TP2 but was wondering will CoPilot function when I'm out of T-mobile's coverage area (for example up in the mountains with no phone service?)??

Yes it will. That is the Internal GPS function. What your thinking is the aGPS which is GPS base on the Cell Phone Towers. Google maps uses the aGPS. The Internal GPS function will work as long as you can see the sky. So it won't work in tunnels or under bridges/overpasses.
Be aware that the CoPilot does not include some Live services like Fuel Prices or Local Search. That is Premium Live services which is an additional $20. It also does not say street names like avertise on the feature list.
I've requested a refund on mine due to those features not being included.. It's been 3days and still no word from customer service.

The main difference with CoPilot is that all the map data is downloaded and saved to your device (usually on an SD card and takes up about 1GB of space). Google maps, TeleNav, etc download the map data as you need it for only the area you are in, so those solutions need the phone to have a Data connection, CoPilot does not.
The GPS service needs not phone data connection. That data is received by the GPS receiver built into the phone from satellites maintained by the United Stated government.

how does gps work on da phone

oi guys ive had a look at a few of those suggested threads about gps and yeah nah they dont really answer my question so feel free to link me to a thread if it answers my question
ok so, what the go.. the phone has gps.. but it doesnt work like a gps device eg navman, tomtom etc.. or does it? i've tried stock froyo and cyanogenmod using that google car app and then going to navigation, but it just keeps searching for a signal for ever. i dont want to use data cause it costs money and defeats the purpose of having a gps.. that is if the phone gps actually works like a gps device. if not then thats pretty bad advertising. anyways let me know, cheers

Mine gets connected to satelites on few seconds,performs as good as my Tom Tom does,i am using Navigon app&maps.

the latest google maps has offline support so you wouldnt need data...

what??! thats rediculous! i left mine in that navigation mode where it was looking for navigation or something like that and the gps symbol was flashing for like 15 min straight as i drove to work and nothing! is it meant to take that long?
EDIT: ok i opened up maps with wifi and it went through all that first time use crap. and so it was using wifi and gps it looked like and that was working. but then when i disabled wifi none of the maps load. only the maps that i had previously loaded while on wifi. wtf? arent maps installed..????????? therefore it should just load them.. what the #%^% im starting to get really pissed off with how stupid this design is. the maps are there, cause theyre installed, and the gps is there so.............. what the ^%#* is its problem?

your right it will only save maps you have browsed while on wifi...i believe there is a setting that overrides this though...

nolook said:
your right it will only save maps you have browsed while on wifi...i believe there is a setting that overrides this though...
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do you know where this setting is? oh and i got the gps to work ie i got it to find me and all that. i did some reading and with gps on most phones the first time they connect it takes a while cause its gotta do all this satellite scanning and then eventually it goes yep ok hes in this part of the country, lets set him up with these satellites and so from then on it connects with gps a lot faster

First of all: the design is just great, you are the stupid.
How GPS work on dah phone ? well just like any other GPS: it receives signal from a few satellites around and it find your position based on the time laps between the reception of each signal (signal come with a time sync).
Now, how WELL does the Legend's GPS work ? as good as any other GPS: very nice in a car or outdoor, but very badly indoor and if it was unable to find your position for 15 minute I'm pretty sure you were indoor (or maybe outdoor in a big city).
Also on smartphone's GPS the data connection can help the GPS itself by downloading some data which will speed up the localisation by satellite, but this is not mandatory and if you're not connected you will end up being positionned. It will only take a few minutes (less than 15)
Finally about the navigation system (which is a bit different of GPS itself) Google's is fairly different than other software because it doesn't come with maps but it download them as you need them:
pros:
-maps are always up to date
-you don't have to waste 2Gb or more on your microSD to store them
-it's free !
cons:
-requires data connection (unlimited download recommanded)
If you prefer usual navigation software, feel free to use co-pilot or navigon or tomtom or any of the other regular software. But you'll have to pay (or crack) them.

Nashan said:
First of all: the design is just great, you are the stupid.
How GPS work on dah phone ? well just like any other GPS: it receives signal from a few satellites around and it find your position based on the time laps between the reception of each signal (signal come with a time sync).
Now, how WELL does the Legend's GPS work ? as good as any other GPS: very nice in a car or outdoor, but very badly indoor and if it was unable to find your position for 15 minute I'm pretty sure you were indoor (or maybe outdoor in a big city).
Also on smartphone's GPS the data connection can help the GPS itself by downloading some data which will speed up the localisation by satellite, but this is not mandatory and if you're not connected you will end up being positionned. It will only take a few minutes (less than 15)
Finally about the navigation system (which is a bit different of GPS itself) Google's is fairly different than other software because it doesn't come with maps but it download them as you need them:
pros:
-maps are always up to date
-you don't have to waste 2Gb or more on your microSD to store them
-it's free !
cons:
-requires data connection (unlimited download recommanded)
If you prefer usual navigation software, feel free to use co-pilot or navigon or tomtom or any of the other regular software. But you'll have to pay (or crack) them.
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whoa whoa whoa hang on now. lets not go throwing the word stupid around especially if you didnt even understand what i meant or you assumed i didnt know how gps works in the first place.
my general question was that it wasnt connecting to gps and the maps werent showing so im thinking you need data for the maps to show even though you have the maps installed, and secondly im thinking something is wrong with my gps or maybe it doesnt work like a normal device navman, tomtom etc because its been half an hour and still no connectivity. then i answered my own question as usual via the internet from other forums i found using google which explained what i said above.
basically with normal gps devices they are already setup with a region.. thingy or whatever it is built into the gps device. this means the first time you connect its actually quite quick because it already has an idea where you are in the world. however with phones, they apparently dont have this so the process of connecting for the first time can range from 3 min, instantly or up to 3 hours like numerous people claimed it had taken for their phones. as for mine it took just over half an hour and now it works fine.
the only question left over now is apparently you can get the maps to show without a data connection through some option change in the settings as someone mentioned a bit earlier.
dont go throwing stupid around mate or assuming anything cause now who looks stupid. besides the design is quite silly since none of this was explained. when they say the phone has gps people (like me) generally go oh wow like those car gps' and expect them to work like that. so when they dont we become a bit skeptical and i was right to do so because look at all this crap ^^^that ive discovered. anyways like i said theres still one stupid thing left about all this which is why data is needed to view maps that are already installed. its like those video games that you install and require you to be on the net to play

You were the one throwing stupid at the design while you still seem to misunderstand how google nav (quit calling it GPS please) works.
Maps are not completely loaded, they're only stored in the cache and that's true only for one scale, and around one place. You can hardly use that to explore the map offline not even mentionning navigating.
The new feature only allow google nav to keep guiding you if you lose connection for a little while. But you can't really use it offline.
I think that design is just awesome, although I have an unlimited data connection. If you don't have that kind of service you should take a look at usual GPS softwares.
And I'm not assuming anything, you asked "how GPS works" not "how google nav works"

Nashan said:
You were the one throwing stupid at the design while you still seem to misunderstand how google nav (quit calling it GPS please) works.
Maps are not completely loaded, they're only stored in the cache and that's true only for one scale, and around one place. You can hardly use that to explore the map offline not even mentionning navigating.
The new feature only allow google nav to keep guiding you if you lose connection for a little while. But you can't really use it offline.
I think that design is just awesome, although I have an unlimited data connection. If you don't have that kind of service you should take a look at usual GPS softwares.
And I'm not assuming anything, you asked "how GPS works" not "how google nav works"
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ugh forget it, i already answered my own question and now you're just being picky and all technical when no one really cares. i think 99% get what i mean so i dont care

GPS is working great. Google Maps is the "problem", more precisely not a real problem but the way it was designed. Unlike other GPS navigation software, the maps are not stored locally but in a cache. The latest version seems to have an offline mode but I didn't tested so I can't say if it's totally offline or not. If you want navigation without using your data connection or WiFi, switch to TomTom, iGO, or similar instead.
That's why Google Maps has only couple of MB and iGO for ex. has over 2 GB with all maps loaded...the difference is the space occupied by the maps.
P.S. And yes, first GPS lock is acquired a little bit later.

Rapier said:
GPS is working great. Google Maps is the "problem", more precisely not a real problem but the way it was designed. Unlike other GPS navigation software, the maps are not stored locally but in a cache. The latest version seems to have an offline mode but I didn't tested so I can't say if it's totally offline or not. If you want navigation without using your data connection or WiFi, switch to TomTom, iGO, or similar instead.
That's why Google Maps has only couple of MB and iGO for ex. has over 2 GB with all maps loaded...the difference is the space occupied by the maps.
P.S. And yes, first GPS lock is acquired a little bit later.
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thank you. that clears it all up
now to that other guy, wouldnt it have been easier to just say that ^

I use Igo for my offline nav. It works just like a tom tom. For my geocaching needs, I use geobeagle.
Sent from my HTC Legend using XDA App

GPS on the XOOM

For you guys who already have the xoom please chime in.
I have a IPAD (dont judge me lol) and the "GPS" does not work while airborne; this is a big deal for me as i am a pilot.
Does the xoom gps only work when in cellphone range like the ipad or does it have a no kidding GPS chip?
On a side not i have no clue how apple gets away with selling the ipad as having GPS when it clearly is not TRUE GPS.

Since the wifi version will contain GPS as well, my guess is that it should work. I'll let you know once I get it in hand today.

When you look up on the Motorola website it states "aGPS" which is assisted GPS. IMO this means it uses regular GPS and other signals in addition. How that translates to airborne IDK. But surely the XOOM shouldn't be used for airplane navigation There's probably an iPad app for that ROFL

pyrator said:
For you guys who already have the xoom please chime in.
I have a IPAD (dont judge me lol) and the "GPS" does not work while airborne; this is a big deal for me as i am a pilot.
Does the xoom gps only work when in cellphone range like the ipad or does it have a no kidding GPS chip?
On a side not i have no clue how apple gets away with selling the ipad as having GPS when it clearly is not TRUE GPS.
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Xoom has the same gps. The chip works fine for following without a cell/wifi connection. To get actually directions you have to have a connection.
Sent from my PC36100 using Tapatalk

its got its own gps chip. and it locks on instantly. and i mean instant. accurate to 4 meters according to google maps.
the only problem you would run into are the maps.
you would need the maps saved on the xoom. google maps can and does cache maps while on wifi, but if you deviate off the set path during the trip you won't be able to load any additional maps during the trip unless you can get a wifi or data connection.
so you would need a gps app that stores the maps on the device if you want it to function like a standard gps. i know there are some for the iphone, but i haven't looked into android 3rd party gps apps.

I think it depends on what you want to use it for. If you want google maps, then the maps program requires data use to show your location on the map. If you simply want Longitude and Latitude, then I'm sure you can get that with the GPS chip in the Xoom.
I've got the Xoom, and the GPS is a true GPS, not relying on cell towers or wifi to determine location. However, I don't know how well GPS works in a plane since I've never tried using a GPS device in a plane (I thought that wasn't allowed?)
Again, unless you have maps STORED on your device, data access is needed to download the maps in real time. Applications like TomTom store the maps on your device, but require an additional and substantial fee.

bwcorvus said:
Xoom has the same gps. The chip works fine for following without a cell/wifi connection. To get actually directions you have to have a connection.
Sent from my PC36100 using Tapatalk
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so what can you do with the gps chip with no connection?
is there anway to save a preloaded map and use your gps chip to locate yourself on the previously saved map?
EDIT: So then theoretically I can dev an app that will have maps saved on the phone for use with no signal?

You should be able to get an app that gives you the GPS coordinates. Everything else is based of stored data, like others mentioned.

RadDudeTommy said:
so what can you do with the gps chip with no connection?
is there anway to save a preloaded map and use your gps chip to locate yourself on the previously saved map?
EDIT: So then theoretically I can dev an app that will have maps saved on the phone for use with no signal?
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Uhmm, theoretically sure, but good luck getting the maps you're going to need, and starting from scratch would be hella painful. You would be better off purchasing a stand alone application with the maps. They usually run around $100, but I'm not sure what ones are available for Android.
They aren't normal maps, they're maps that contain location data, gps coordinates, etc.
Again, you can use a GPS app to pull your coordinates. Just do that and use a paper map to determine where you are? hehe

you might check out http://www.mapdroyd.com/

pyrator said:
For you guys who already have the xoom please chime in.
I have a IPAD (dont judge me lol) and the "GPS" does not work while airborne; this is a big deal for me as i am a pilot.
Does the xoom gps only work when in cellphone range like the ipad or does it have a no kidding GPS chip?
On a side not i have no clue how apple gets away with selling the ipad as having GPS when it clearly is not TRUE GPS.
Click to expand...
Click to collapse
You really want to know why you can't use the GPS (of your mobile device) while you're flying?
You're not a commercial pilot I hope!
I'm sorry I'm just having a hard time picturing my Continental Airlines pilot asking for directions from texas to california because he forgot his Ipad at home.

I know the app AlpineQuest uses maps that you yourself create from a list of already available maps and then you load them onto your device and select them from the application. Its primarily for hiking since some terrain does not offer a 3g signal. But I recommend you check that out.

Does you tried IGO ???
(propably no plane support )

Thanx
ok got my answer thank you!
Also the GPS on a device will not interfere with any aircraft electronics and is 100% ok during flight. AKA when not flying and riding along everyday for 4+ hours with nothing to do.

cwizardtx said:
You really want to know why you can't use the GPS (of your mobile device) while you're flying?
You're not a commercial pilot I hope!
I'm sorry I'm just having a hard time picturing my Continental Airlines pilot asking for directions from texas to california because he forgot his Ipad at home.
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Actually I am a FAA certified Commercial pilot, i have a degree from Embry-Riddle in Professional Aeronautics with dual minors in safety and business, over 275 combat hours alone just here in Afghanistan, so no that does not automatically mean you fly for the airlines.
Also you cannot use an unapproved system for your primary means of navigation. The only GPS you may use is an IFR approved unit with a current database. Also if you choose to go that route you must have a backup (VOR, NDB, etc).
See:
http://www.wired.com/autopia/2011/02/faa-ipad/
http://www.wired.com/autopia/2010/06/new-airplane-should-motivate-apple-fanboys-to-be-pilots/
(just needs to be android not ipad)
The reason i ask is because when im not flying aka in the back aka a passenger, im bored and would like to be able to see where i am at on a map.
But thank you for contributing nothing to this post other than to launch a personnel attack against my creditability.
Rant over:
To everyone else who actually contributed to the post THANK YOU! I will try probably all of those apps lol. I just wish there was a FalconView port for android (open source DoD app designed for windows).

may it's out of civilian range, see en.wikipedia.org/wiki/Global_Positioning_System#Restrictions_on_civilian_use

Hi pyrator,
I too am a pilot (mind you, not FAA but on the other side of the pond) and I'm also very interested in using Android tabs for aviation.
Of course not IFR, but as a backup information in VFR should the Garmin fail (never did so far)
It would be very interesting to find out what the real capabilities of the onboard sensors are.
Take the gyro for example: if it doesn't drift, it might be an interesting source for a poor man's EADI (attitude indicator) should your vacuum pump quit. It all depends if it is influenced by accelerated flight (I've looked at a few apps that wanted to simulate an AI but they relied on the accelerometers and, in a coordinated turn, you got zilch)
I'm a programmer so I guess writing an application would be an option, but its much more fun if you're not alone....
What do you think?

GPS in the Xoom is standalone. It works with wifi and 3g off. I installed copilot and it works as well as all the tomtoms and garmins that I have used. U get a beautiful 10 inch gps.
Agps is based on cellular signals.
Sent from my GT-I9000 using XDA Premium App

1. Non-commercial VFR (in the US) you can use anything you want. You don't even need a chart. If you have a chart, it must be current. This may apply to map data.
2. The prohibition against using Cell Phones, etc while flying (in the US) is not a FAA rule but a FCC rule. If your 3G unit is transmitting from a high altitude the Cell(s) on the ground have a hard time figuring out which cell you're in.
3. As a Pax aloft, put the Xoom in airplane mode (turns off the 3G) after you've loaded up map data for your intended area and (fuselage skin notwithstanding) you should be able to follow along just fine. Keeping the unit near a window may be necessary.

GPS in my xoom does not work without wifi.
I have read the threads and I am unable to make it work without wifi like driving. I have the maps incache, but the GPS signal does not show. The ipad does because I have use it multiple times. What to do. Many hours wasted.

about GPS works

I have an easy question about GPS, I am using Vibrant without network plan. So I don't know if I can use GPS with out any wifi or 3g? I am using the BV 1.3.1 now.. If that will work, how can I set up?

GPS uses military run satellites to determine you location. The network or data transfer is irreverent. Your GPS will work without network connection.
Now lets say you try to navigate to a location with Google maps. This will not work, although the phone will know your location it can not use the network to DL the maps nor calculate your route. If you use a nav app that store a maps on your SD card, then you'll be fine

SykesAT said:
GPS uses military run satellites to determine you location. The network or data transfer is irreverent. Your GPS will work without network connection.
Now lets say you try to navigate to a location with Google maps. This will not work, although the phone will know your location it can not use the network to DL the maps nor calculate your route. If you use a nav app that store a maps on your SD card, then you'll be fine
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+1 yup plus it will be slower

oka1 said:
+1 yup plus it will be slower
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It will be slower? The GPS navigate will be slower or the phone will be slower? much slower?

oka1 said:
+1 yup plus it will be slower
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Is there any nav app that we can't download free and store the maps in SD so that can navigate without network?

oka1 said:
+1 yup plus it will be slower
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pxc668 said:
It will be slower? The GPS navigate will be slower or the phone will be slower? much slower?
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I don't see how the phone would be slower, in any regard. It would not affect the phones processing speed, nor would the gps run slower. The only thing that could be slower is finding your location from a cold start, using network location can speed this, but imo it's irrelevant. Network location is too inaccurate for navigation.
There are some apps which store maps, but none that are free. Maybe someone else knows of one.

In my experience, GPS lock can be considerably slower without the network. The AGPS works by querying the network to get supplemental information like precise time and maybe ephemeris data (precise sat location) which can make a huge difference in acquiring lock. The phone is capable of acquiring lock without this network aid, but locks can take minutes, and accurate locks can take many minutes.
Of course, the other caveats about requiring off-line maps etc for navigation functions also apply.

I don't have a data plan either but my gps works just fine. It locks onto sats in about 10 sec.
http://forum.xda-developers.com/showthread.php?p=10488647
thats open source map app where u can drop locations to go turn by turn (initially the maps load over wifi, but u can choose to save them and save them according to the resolution. I live in Atlanta so i only saved the GA portion with a decent resolution, which is nice that i dont have to worry about downloading states ill never need).
i personally use copilot live more (about 1gb for USA maps with poi)
i forgot the price, but it is 100% worth it (almost better than my in car navi)
Running bionix btw if that helps with gps lockon timings
and dont forget to get apn droid from the app store to make sure it disables all cellular network data. only downside is that if you want mms then u have to turn it back on reboot and then download the mms then turn it off again, but i dont get many mms anyway so its ok.

Get CoPilot Live USA.
Its $5 on the market and it preloads the maps for the country on your phone. Works WITHOUT data and the interface is SLICK. Full 3D navigation with really good voice turn by turn.
One of the best purchases I ever made. Hope it helps you too
PS: Maps get updated about every month so they are always current as far as road names and points of interest. Note that since it isn't using any data and data triangulation, if it is the first time you use it after a phone reboot it will take up to 3-4 minutes to lock on. This is normal as it is the same if you try any 3rd party GPS receiver navigation system. Once you've used it once since the phone has booted up, lockon time will be under a minute.

Offline navigation using the nexus 10

Suppose I want to use my nexus 10 to navigate a trip from Boston to New York... A clever guy might say 'I can just preload the map'. But that won't work because when I try and load that much map it says to me 'not enough storage, map too big'. The thing is I have nearly 30 gigs free on this thing and it looks like it can't get much beyond a few hundred megs of map storage. Is there some way to kick up the storable size of a map selection? I've not found any setting in maps that'll let me save even the state of tiny Rhode Island! Or will this thing save enough map if I set up navigation before breaking the WiFi connection that it'll just work?
Sent from my Nexus 10 using xda app-developers app

Doctor Dedroid said:
Suppose I want to use my nexus 10 to navigate a trip from Boston to New York... A clever guy might say 'I can just preload the map'. But that won't work because when I try and load that much map it says to me 'not enough storage, map too big'. The thing is I have nearly 30 gigs free on this thing and it looks like it can't get much beyond a few hundred megs of map storage. Is there some way to kick up the storable size of a map selection? I've not found any setting in maps that'll let me save even the state of tiny Rhode Island! Or will this thing save enough map if I set up navigation before breaking the WiFi connection that it'll just work?
Sent from my Nexus 10 using xda app-developers app
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in google maps use the "make available offline" and break the route into separate slightly overlapping squares instead of one large area which will be too big for it. if you just try to save new york to boston in one large square you are getting tons of extra area you dont need and it wont work. if you break it down i think it will let you save 6 or 7 smaller offline maps. ive been able to use it offline between cincinnati and washington dc doing this and it worked fine.
not sure if there is a way to increase the storage limit it sets but it would be nice.

Best suggestion would be Dave's, Google Maps does not allow making big areas available as offline maps.
Btw doesn't the Nexus 10 have a GPS? I thought this GPS would work without the need of a data connection since the Nexus 10 does not support data connection but WiFi only, could someone please confirm or deny this? If you do need a wireless internet connection, then I would say it's stupid to have a GPS built-in if I can just use the network location future for map use when I'm connected to the internet.

daLareid said:
Best suggestion would be Dave's, Google Maps does not allow making big areas available as offline maps.
Btw doesn't the Nexus 10 have a GPS? I thought this GPS would work without the need of a data connection since the Nexus 10 does not support data connection but WiFi only, could someone please confirm or deny this? If you do need a wireless internet connection, then I would say it's stupid to have a GPS built-in if I can just use the network location future for map use when I'm connected to the internet.
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First off, thanks to Dave for the suggestion. I wasn't making the connection... Thought I needed one saved map. The Nexus 10 does have GPS... But when using my phone for navigation, doesn't it download the maps as it needs them? If this is so, then once you broke the wireless connection , the Nexus 10 wouldn't be able to load maps as needed. I was under the assumption that I would have to preload the maps somehow which of course, Google Maps can do. If this device is smart enough to load all the bits of map it needs for whatever route it calculates... Then all of this discussion is mood anyway. Of course if you set up your phone for wifi hotspot and you wouldn't need to preload the maps it seems to me... that is of course assuming that you prefer to use the Nexus 10 for navigation rather than your phone.
Sent from my Nexus 10 using xda app-developers app

Doctor Dedroid said:
First off, thanks to Dave for the suggestion. I wasn't making the connection... Thought I needed one saved map. The Nexus 10 does have GPS... But when using my phone for navigation, doesn't it download the maps as it needs them? If this is so, then once you broke the wireless connection , the Nexus 10 wouldn't be able to load maps as needed. I was under the assumption that I would have to preload the maps somehow which of course, Google Maps can do. If this device is smart enough to load all the bits of map it needs for whatever route it calculates... Then all of this discussion is mood anyway. Of course if you set up your phone for wifi hotspot and you wouldn't need to preload the maps it seems to me... that is of course assuming that you prefer to use the Nexus 10 for navigation rather than your phone.
Sent from my Nexus 10 using xda app-developers app
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So you can confirm the GPS feature is pretty much useless? that's pretty much what I would be meaning to use it for, Navigation, but like I said before if it only works with a working internet connection then it truly is pointless, why would I bother tethering my mobile's data connection to enable the Nexus 10 when I can instead just use my mobile for Navigation. Has anybody else tried Navigation via GPS only on Nexus 10?

daLareid said:
So you can confirm the GPS feature is pretty much useless? that's pretty much what I would be meaning to use it for, Navigation, but like I said before if it only works with a working internet connection then it truly is pointless, why would I bother tethering my mobile's data connection to enable the Nexus 10 when I can instead just use my mobile for Navigation. Has anybody else tried Navigation via GPS only on Nexus 10?
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Sent from my Nexus 10 using xda app-developers app
I simply have not had the opportunity to try using it for navigation yet. I have several apps that do need to have a good position in order for them to function correctly. In particular the the app that needs an accurate as possible location is called sattrack.
I believe if you pre load maps prior to leaving on your trip then the position will be quite accurate as provided by the GPS. I believe the only issue that I'm bringing up is whether or not the maps preload automatically prior to taking the Nexus 10 on the road.
Yes tethering is perhaps somewhat superfluous... However if you want a bigger display it seems like one way to do it.

Copilot Live is cheap, and works very well ...

Doctor Dedroid said:
Sent from my Nexus 10 using xda app-developers app
I simply have not had the opportunity to try using it for navigation yet. I have several apps that do need to have a good position in order for them to function correctly. In particular the the app that needs an accurate as possible location is called sattrack.
I believe if you pre load maps prior to leaving on your trip then the position will be quite accurate as provided by the GPS. I believe the only issue that I'm bringing up is whether or not the maps preload automatically prior to taking the Nexus 10 on the road.
Yes tethering is perhaps somewhat superfluous... However if you want a bigger display it seems like one way to do it.
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I've tried it and it works. Download the mapping data of the areas you are traveling and it will navigate offline.
Sent from my Nexus 4 using xda app-developers app

Doctor Dedroid said:
First off, thanks to Dave for the suggestion. I wasn't making the connection... Thought I needed one saved map. The Nexus 10 does have GPS... But when using my phone for navigation, doesn't it download the maps as it needs them? If this is so, then once you broke the wireless connection , the Nexus 10 wouldn't be able to load maps as needed. I was under the assumption that I would have to preload the maps somehow which of course, Google Maps can do. If this device is smart enough to load all the bits of map it needs for whatever route it calculates... Then all of this discussion is mood anyway. Of course if you set up your phone for wifi hotspot and you wouldn't need to preload the maps it seems to me... that is of course assuming that you prefer to use the Nexus 10 for navigation rather than your phone.
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I dont think it will save the maps along the route if you have a connection initially but it might.
On both my phone and tablet i usually have the area i normally am traveling within always saved offline- it loads faster and if you lose cell service it still works. If i break it into seperate maps i easily can save a 100+ mile radius from home which is probably 99% of my normal travel. If i am headed on a long trip i just delete a few local files and i save along the route and im good to go. If you save the maps offline make sure you are on wifi and not on cell connection or tethering- only takes a few minutes on wifi but files are a little big to do over cell.
to the questions others had about the gps. its very accurate and quick on the nexus 10. in addition to the navigation i have occasionally used some other apps to map some project sites using it and also to view topo and other maps.

Has anybody tested the device with offline programs like iGO or Sygic (with pre-downloaded maps)?

Hmm... I've tried downloading and using offline maps for trips and I found that it wasn't reliable... when I lost connection the GPS couldn't track my location. However, I will mention that I did not make the entire distance from my starting location to destination available offline... I assumed once I was in the area that I downloaded it would automatically pinpoint my location. Maybe I was wrong to think that?