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post #41 of 52 Old 12-15-2012
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Re: Free or low cost GPS navigation software?

Hi Thomas,
I have a Garmin 441(and paper charts!) but also have the Navionics app for my Android phone. Both have the same level of detail as the paper charts.

The funny thing is the Navionics app which cost $10 is way more accurate than the Garmin which cost ~$400. I think the Navionics app is using the cell toowers as well as the phone's GPS to resolve location. The phone can tell me which side of the slip I am on whereas the Garmin has me "near" the marina.

I agree with the others that you should use a depth sounder for monitoring depth, not the charts or chart plotter. Once while sailing with dead depth sounder, I actually grounded three miles off shore in what was supposed to be deep water according to the chartplotter. After being towed in I reviewed what happened and found that I had the chart plotter zoomed out so a series of shallows was not displayed. Had the depth sounder been working I would have noticed something wasn't right and possibly avoided a few thousand dollars of damage.

Regards, John
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post #42 of 52 Old 12-15-2012
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Re: Free or low cost GPS navigation software?

John, apparently on the 441 you can manually turn the WAAS and EGNOS augementation on/off. If it wasn't turned on, that would help explain lower accuracy.
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post #43 of 52 Old 12-16-2012
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Re: Free or low cost GPS navigation software?

Thanks. I bet WAAS it is not activated. That would explain it. I have a narrow winding channel with inaccurate markers to pass thru each time I go out to the ocean. The GPS(on my phone) is really usefull when coming in at night. I noticed on the Garmin that each time I passed through the channel it showed me way off course...like actually on land. I'll check it next time I go to the marina. Thanks
for the advice!

John
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post #44 of 52 Old 03-04-2013
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Re: Free or low cost GPS navigation software?

I just spent totally frustrating time trying to download opencpn. Carefully following instructions on a desktop running W7, I was able to only download a decompression program. No navigation program. The download also graciously loaded Yahoo onto my computer, which I had no interest in. Getting rid of Yahoo is almost impossible. I urge caution before trying to down load opencpn at this time.
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post #45 of 52 Old 03-04-2013
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Re: Free or low cost GPS navigation software?

don, it sounds like either you've been hijacked by malware or you hit a wrong button.
I'm also in Win7, running MSIE by default. I do have Java and Javascript disabled, you may find malware has been snuck onto on many third=party web sites that can invade your computer if you leave those on.

I literally just went to Download OpenCPN | Official OpenCPN Homepage and clicked on the prominent Windows logo. A pop-up asked if I wanted to save or run the setup file, I saved it then ran it. opcn installed (over my older edition) and I took all the defaults. There was never a hint of Yahoo or any other browser modification. No sign of one in the installation log either.

If you didn't hit a wrong button, I'd suggest a couple of malware scans.
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post #46 of 52 Old 03-04-2013
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Re: Free or low cost GPS navigation software?

Quote:
Originally Posted by hellosailor View Post
OpenCpn is really the greatest bit of free softwear on the net.

I use it in preference to a chart plotter, and its miles and decades further advanced than anything on iPad etc.

And the CM93 charts are on the net on a 4 hour download... Or just knock on any cruisers hull (that's been anywhere) and they will give you a copy.
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post #47 of 52 Old 03-04-2013
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Re: Free or low cost GPS navigation software?

You may find that besides being somewhat outdated (by five years?) the CM93 charts online aren't even online anymore. Passagemaker's web site now refers people to download them from "CM93 vector charts: covering the entire globe, available at Sedo Domain Parking - Sedo GmbH " and those xx'es are just a placeholder. Stolen software is still available on the web, but enforcement actions are getting stronger. And that's ignoring the amount of malware these sites often will give you, simply by opening their pages.

In the US there was an announcement last week by a number of major ISPs that they will give users multiple warnings, then start to take actions (like radically throttling their accounts) if they suspect substantial downloads of pirated copyrighted material. Which would be a tip-off that they are monitoring the sites, and prosecution could easily follow.

Better to ask a fellow cruiser if you can steal, ergh, borrow, a cup of sugar. (G)
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post #48 of 52 Old 03-04-2013
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Re: Free or low cost GPS navigation software?

Have to agree with hellosailor that the problem is on your end, dongreerps. Over the weekend I downloaded the latest version of OpenCPN and installed it with absolutely no issues at all. Were you downloading it from the official OpenCPN site? That would be OpenCPN | Official OpenCPN Homepage
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post #49 of 52 Old 03-04-2013
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Re: Free or low cost GPS navigation software?

Have I mentioned how happy I am with Polar Navy? For <$50 for up to 5 PCs (one license covers 5 installations); it is easy to use, easy to update, and it works!

Maybe I have...

DISCLAIMER: I have NO affiliation with PolarNavy, other than as a satisfied user.
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post #50 of 52 Old 03-04-2013
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Re: Free or low cost GPS navigation software?

Quote:
Originally Posted by dongreerps View Post
I just spent totally frustrating time trying to download opencpn. Carefully following instructions on a desktop running W7, I was able to only download a decompression program. No navigation program. The download also graciously loaded Yahoo onto my computer, which I had no interest in. Getting rid of Yahoo is almost impossible. I urge caution before trying to down load opencpn at this time.
You probably tried to downloaded it from softpedia or one of the other scam sites instead of from opencpn's site. These sites make money off of other people's software by optimizing their pages to show up in search results and then serving up a page full of ads to people searching for the software. Instead of directing people to the real site of the software they provide a fake download link that installs adware and spyware on you computer. Then maybe you get directed to the opencpn site to download it (using opencpn's bandwidth of course), which you could have done all along without ever visiting the scammer's site.
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