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Bent
Pony Mullet
Joined: 26 Feb 2012
Posts: 55
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 Posted: Tue Feb 16, 2016 9:53 pm Post subject: GPS tracks have shifted?????? and report |
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I noticed this winter that all of my GPS tracks both current and old have shifted Southeast in respect to my maps of the channels by about 40-60 ft.
Anyone else see this?
Fishing was good in the afternoons in shallow off color water. Also notice nice sheepheads staging on submerged pilings from Pita to the Boat hole. They where not interested in my plastics but a free lined live shrimp would have been the ticket for them.
Bent |
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lagunarat1975
Horse Mullet
Joined: 15 Nov 2013
Posts: 188
Location: calallen
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| Posted: Wed Feb 17, 2016 1:02 pm Post subject: |
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you running lowrance?
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EAT,SLEEP,BREATHE,FISHING |
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Mason
Horse Mullet
Joined: 30 Dec 2007
Posts: 102
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| Posted: Wed Feb 17, 2016 10:31 pm Post subject: |
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GPS for recreational purposes is pretty accurate, but far from an exact science. I've noticed some of my waypoints have "moved" slightly before.
Most units are capable of 3-4 meter accuracy at best but this can worsen due to various reasons. Among other things, GPS signals can actually reflect on water under certain conditions causing inaccuracies. Do some internet recon on GPS and you'll find more info.
Next time you go out check it again, I would bet your old tracks will be back to normal
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"Deep inside, you know the fish isn't the only one that's hooked" |
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Bent
Pony Mullet
Joined: 26 Feb 2012
Posts: 55
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| Posted: Thu Feb 18, 2016 9:01 pm Post subject: |
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I am using a Humminbird GPS with a Navionics chip in it.
My track use to be centered for example in the Humble crash channels when I ran them. If I follow my old tracks I am still in the center of the channel but my map image shows me out of the channel.....
Maybe there is an offset setting in the map image verses GPS position?
Dang don't make me read a manual!!  |
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ratherbefishing
Member White Shrimper Boot Club
Joined: 20 Oct 2008
Posts: 868
Location: Arlington, Tx
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| Posted: Fri Feb 19, 2016 10:36 am Post subject: |
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| Bent wrote: | I am using a Humminbird GPS with a Navionics chip in it.
My track use to be centered for example in the Humble crash channels when I ran them. If I follow my old tracks I am still in the center of the channel but my map image shows me out of the channel.....
Maybe there is an offset setting in the map image verses GPS position?
Dang don't make me read a manual!! |
If I was you, I would keep following the tracks. Just saying...
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| SailBad the Sinner wrote: | | What isn't located behind a What-a-burger in Corpus? |
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ProdigalSon
Finger Mullet
Joined: 06 Feb 2011
Posts: 11
Location: Corpus Christi
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| Posted: Mon Feb 22, 2016 8:08 am Post subject: Ditto |
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| I'm having the same issue with my Lowrance unit. I first noticed it after installing some new overlays (Navionics, I believe). So, I switched back to the factory overlays but am still having the same issue. Tracks and eyeballs show me in the channel, chart shows me out. Interested to hear if anyone has ideas on a fix. |
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Lat22
Horse Mullet
Joined: 07 Mar 2006
Posts: 233
Location: Falfurrias/Tiki Island
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| Posted: Tue Feb 23, 2016 5:30 pm Post subject: |
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Shouldn't affect you in Baffin. I'm pretty sure the rocks move in there too.  |
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