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??PLEASE HELP?? GPS CHARTPLOTTER?

Old 03-20-2003, 04:46 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

Hello,
I up graded from my regular gps which I also had connected to a DGPS to a gps chartplotter with WAAS.
Now my question,Is the WAAS as accurate as a gps w/ dgps or should I connect the dgps to my new unit? Thanks.
Mike
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Old 03-20-2003, 04:54 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

suggest you just do a search right here at thehulltruth for WAAS DGPS ... (it's not DPGS)

Lots of information since this question has been asked many times before
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Old 03-21-2003, 10:58 AM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

As I understand it

WAAS-most accurate
DGPS-next step down
GPS- step down again
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Old 03-21-2003, 02:17 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

Codfish hit it on the nose.

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Old 03-21-2003, 03:38 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

WAAS and DGPS are basically on about par and especially considering the precision/display capability of the equipment in question one is going to be very hard pressed to tell the difference.

That is of course as long as you can receive an adequate signal from either or both?, which will depend on your location somewhat and certainly wouldn't really refer to DGPS as a "next step down".

Cheers, Kerry.

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Old 03-21-2003, 03:41 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

I guess I should of rephrazed my question.
I had a gps connected to a dgps....
I bought a gps chart plotter with waas...
Should I connect my new unit to the old dgps?
Sorry for the confusion I may have caused in my first reply
Thanks again for any and all responses.
Mike
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Old 03-21-2003, 07:09 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

I believe waas is a little closer but then again this all depends on location.I have both waas and dgps and 99% of the time the lat-long #s are a match ,where I live anyway.JMO



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Old 03-21-2003, 07:51 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

quote:Originally posted by Fish on!:
I guess I should of rephrazed my question.
I had a gps connected to a dgps....
I bought a gps chart plotter with waas...
Should I connect my new unit to the old dgps?
Sorry for the confusion I may have caused in my first reply
Thanks again for any and all responses.
Mike

If you told us what unit you used to have, and what you have now it would be a lot easier to answer your question. Not all WAAS GPS receivers will accept a DGPS signal and vice versa.

Ed
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Old 03-22-2003, 06:49 AM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

My old unit was a Magellon5000 and Magellon dpgs.
New unit is a Garman182C chartplotter.Thanks
Mike
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Old 03-22-2003, 08:06 AM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

quote:Originally posted by Fish on!:
My old unit was a Magellon5000 and Magellon dpgs.
New unit is a Garman182C chartplotter.Thanks
Mike

The Garmin182C will accept DGPS input in RTCM SC-104 format. If the Magellan differential beacon outputs data in that format (it probably does) you should be able to connect it to the Garmin. You wont be able to plug the Magellan beacon directly into the Garmin - the manuals should tell you which wires you need to connect.

How useful it will be is questionable. WAAS is very accurate by itself - using the differential signal will not give you a noticeable improvement. I wouldn't bother with the differential beacon unless you have problems with getting the WAAS signal reliably.

Ed
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Old 03-23-2003, 06:36 AM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

Thanks again for "all" the responses.
Mike
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Old 03-23-2003, 03:01 PM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

The claims are wass=3m, dgps=5m repeatability. Try your new waas plotter as is against old known fixes and compare. A lot depends on your proximity to Dgps land based location that corrects the gps signal, where waas is not dependent on the land based correction. Good Luck, D2
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Old 03-27-2003, 04:25 AM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

I have been running 7.8 ft accuracy with waas. I could care less what dgps is since I don't have to fool with a separate antenna.

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Old 03-27-2003, 05:23 AM
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Default ??PLEASE HELP?? GPS CHARTPLOTTER?

Great information on all. www.navcen.uscg.gov/

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