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Old 05-10-2021, 15:40   #1
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Join Date: Oct 2021
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GPS accuracy and polling rate.

Hi all, first post here, Iíve been using Open CPN for about 5 years now on my launch.
Iím running windows 10 with a USB dongle for GPS in New Zealand. We get a good GPS signal and it shows many satellites connected but the frequency in which it updates position is not fast enough. I do a lot of deep drop fishing so I need to be able to accurately see my drift and direction of travel. Iím finding currently I can drift 100m before it even realises and then just draws a straight line to where I am now from where I stopped motoring. I think a digital compass would also be a nice addition in finding out the heading of the boat vs the direction of drift.
Does anyone have any ideas on how I can improve the accuracy of the software?
Is there a go to GPS dongle to use on windows 10 that might just make everything much better?

Thanks
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Old 05-10-2021, 16:32   #2
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Join Date: Aug 2015
Location: Sozopol
Boat: Riva 48
Posts: 1,349
Re: GPS accuracy and polling rate.

Dongles are typically bad GPS receivers without WAAS correction and 1 second update rate. Best bet is to get a marine GPS or one of these:

https://www.amazon.com/dp/B073P3Y48Q...NsaWNrPXRydWU=

Basically, anything that has U-Blox in it is high quality, 10 Hz or higher update rate and WAAS.
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Old 05-10-2021, 16:49   #3
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Re: GPS accuracy and polling rate.

Quote:
Originally Posted by Pizzazz View Post
Dongles are typically bad GPS receivers without WAAS correction and 1 second update rate. Best bet is to get a marine GPS or one of these:

https://www.amazon.com/dp/B073P3Y48Q...NsaWNrPXRydWU=

Basically, anything that has U-Blox in it is high quality, 10 Hz or higher update rate and WAAS.
No worries, Thanks for the reply!
I will buy one of those little dongles you linked. Otherwise if that doesnt make life better I will just get a new GPS/Fishfinder/Radar combo..
Thanks
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