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Forum: General Sailing Forum

03-07-2020, 15:59

Replies: 56

GPS upended?

Views: 4,413

Posted By StuM

Re: GPS upended?

I'd never tried it, just seen the option.
You are correct. In Battery saver mode, my navigation apps say GPS not connected and Google map has my location jumping around up to several hundred meters...

Forum: General Sailing Forum

03-07-2020, 04:34

Replies: 56

GPS upended?

Views: 4,413

Posted By StuM

Re: GPS upended?

Mobile phones frequently use cellular networks (not data) as well as GPS for location services.

My Samsung phone has three "Location Methods" which can be selected:
1. High accuracy - uses...

Forum: General Sailing Forum

02-07-2020, 17:27

Replies: 56

GPS upended?

Views: 4,413

Posted By StuM

Re: GPS upended?

WAAS is the US implementation of a SBAS (Satellite Based Augmentation System)

It sends out corrections through geostationary satellites which are serving as relays for fixed ground stations.
...

Forum: General Sailing Forum

01-07-2020, 15:44

Replies: 56

GPS upended?

Views: 4,413

Posted By StuM

Re: GPS upended?

It's all about how far away you are from the DGPS station. DGPS is only that accurate at short range. The USCG was only ever looking at WAASS levels of accuracy and their solution was set up pre...

Forum: General Sailing Forum

30-06-2020, 21:26

Replies: 56

GPS upended?

Views: 4,413

Posted By StuM

Re: GPS upended?

Aah, so you are not talking about

"a marine and is an aviation differential GPS system that uses ground stations and satellites to transmit corrections to GPS that are independent from the GPS...

Forum: General Sailing Forum

30-06-2020, 17:11

Replies: 56

GPS upended?

Views: 4,413

Posted By StuM

Re: GPS upended?

Are you taking about WAAS? If so, do you have a reference to it being shut down? And what's the difference beteen marine and aviation in that context?
If not, what satellite correction...

Forum: General Sailing Forum

29-06-2020, 17:42

Replies: 56

GPS upended?

Views: 4,413

Posted By StuM

Re: GPS upended?

Location(s) ?
Potential proximity to GPS jamming devices?

Forum: General Sailing Forum

29-06-2020, 17:41

Replies: 56

GPS upended?

Views: 4,413