GPS Fix

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allsail

allsail

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Oct 31, 2005
21
Catalina 350 Brunswick Landing Marina, Brunswick, GA
I have a Raymarine GPS and C80 CP. Last summer lost a fix on 2 or 3 occasions for short periods. Yesterday i lost a fix for a short period and today i lost it early and never got back as of 2:00 pm. I am located near Annapolis, MD. First, i was wondering if anybody in that area lost satellite contact yesterday or today. Second, what is the experience of people with similar equipment, etc? Third, is my experience/performance typical or atypical? My equipment is still under warranty. Thanks.
 
chuckwayne

chuckwayne

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Mar 20, 2004
1,753
Hunter 356 and 216 Portland, ME
gps lost fixes

the raystar 120 has had problems like this, and some were recalled-contact Raymarine service
 
P

Pete

use a hand held

and run a test. If your hand held and boat unit both lose signal you will know it is most likely the gps system or maybe the operating location of the units. If one works and the other doesn't may be time for the repair shop.
 
Paul Akers

Paul Akers

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Dec 3, 2003
2,101
Hunter Legend 37 Portsmouth, RI
Location Plays a Factor

I'd follow up on Chuck's comment first, but, I know, that your surroundings will make a difference. Are you near a secure area, building, ships? Are you near the gov't offices? A couple of year's ago, a submarine from Groton, CT passed by and the GPS got all scrambled until the ship went out of range. Then it went back to normal. So the gov't at work may have some affect on your GPS signal.
 
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haffiman37

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Mar 27, 2006
5
Jeanneau Sun Oddysey 37 Langkawi, Malaysia
Lost fix Raystar 120 Sea Talk

There was (is) a problem with all the 120 Sea Talk version, not the NMEA version. The buffer for stored possitions used for back track gets overloaded. The 120 does not have an automatic restart if it happends, the 125 has. Get a 125GPS or if it happends again turn of ALL instruments and restart your systems. If you put a switch in the red wire going to the GPS you may restart the GPS with that.
 
P

Pete

Spring forward

A similar thing happened to me two years ago, in late fall -- the GPS crapped out, and when I got it back up, it was showing me a position somewhere east of Capetown, S.A. As it turned out, it had to do with the end-of-year time change. The GPS thought it was a different time than it really was, so it couldn't pick up the satellites or triangulate them to the proper coordinates for the boat. Whatever the case, once I reset the clock on the GPS, all was right with the world. Maybe that was your problem? (After all, last weekend was the "spring forward" time change.) Pete s/v EmmieLou (Oday 322) Little Silver, NJ
 
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Liam

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Apr 5, 2005
241
Beneteau 331 Santa Cruz
Don't the satalites know...

Don't the GPS receivers know... what time it is like cell phones do? I didn't know that I had to reset the clock.
 
P

Pete

Depends

Maybe it depends on the unit -- mine was an older model Garmin handheld, and it didn't know what time it was. I'll have to check the new fixed-mount unit that I'm putting in, to see if it can tell time. And, FWIW, the idea of checking the clock on the unit to see if it was right came either from this board or from the Garmin website. I don't recall. Pete s/v EmmieLou (Oday 322) Little Silver, NJ
 
Warren Milberg

Warren Milberg

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Dec 1, 1999
2,391
Hunter 28.5 Chesapeake Bay
I was sailing....

... yesterday about 20 miles south of Annapolis (did an west-east run from Herring Bay to Poplar Isl and back) between 10am-3:30pm. I had my Garmin 76 running the whole way and never noticed any signal degradation or anomalies. But as you know, local conditions/interference may affect some GPS signals now and then. You can also contact teh USCG and see what they say about whether the system may have burped a few times yesterday ( CIVILIAN: FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT COMMERCIAL (703)313-5900 24 HOURS DAILY AND INTERNET HTTP://WWW.NAVCEN.USCG.GOV) Hope this helps.
 
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