Go Back   Winnipesaukee Forum > Winnipesaukee Forums > General Discussion
Home Forums Gallery Blogs YouTube Channel Classifieds Links Calendar Register FAQDonate Members List Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
Old 09-22-2014, 07:04 AM   #1
Steveo
Senior Member
 
Join Date: Apr 2004
Posts: 506
Thanks: 46
Thanked 118 Times in 60 Posts
Default Weird GPS problem

Well I hope this very astute forum can help me with my weird GPS problem. I have a Standard Horizon Chart 155C GPS. It came with the boat I bought last year so I assume same age as boat at 8 years old. Last year the GPS worked fine. When turned on it would typically pick up satellites within a minute regardless of the weather. This year has been totally different. If it is totally sunny out it takes a very long time, usually never to pick up the satellites. If it is partly sunny I can usually pick them up after several minutes. If it is completely cloudy out I pick them up as soon as I turn it on.

Tell me that ain't weird. Can anyone help with an answer.
Steveo is offline   Reply With Quote
Old 09-22-2014, 07:34 AM   #2
fpartri497
Senior Member
 
Join Date: Jul 2002
Location: Concord NH
Posts: 681
Thanks: 97
Thanked 47 Times in 38 Posts
Default

easy answer- only boat on Cloudy days


__________________
dont worry be happy
fpartri497 is offline   Reply With Quote
Old 09-22-2014, 07:46 AM   #3
8gv
Senior Member
 
8gv's Avatar
 
Join Date: Jan 2012
Posts: 1,183
Thanks: 25
Thanked 361 Times in 225 Posts
Default

Total WAG's here...

Does it have a remote antenna?

If so, could the sun be heating it up a connection weakening it?

Do you deploy any shade from the sun or rain that has a metal frame effecting this?
8gv is offline   Reply With Quote
Old 09-22-2014, 08:50 AM   #4
Slickcraft
Senior Member
 
Join Date: Mar 2008
Location: Welch Island and West Alton
Posts: 2,596
Thanks: 832
Thanked 1,428 Times in 659 Posts
Default

Quote:
Originally Posted by 8gv View Post
Total WAG's here...

Does it have a remote antenna?

If so, could the sun be heating it up a connection weakening it?

Do you deploy any shade from the sun or rain that has a metal frame effecting this?
The 155C does have an external antenna. Sounds like blockage or a poor connection, maybe corrosion. A poor connection may just allow for operation on a sunny day but clouds will add just enough attenuation to kill operation. So check the connections and use a little bit of dielectric grease on them.

The remote "smart antenna" requires good battery/ground connections as well as the antenna signal. Four connection pins on each end. Most likely problem is the ground.
Slickcraft is offline   Reply With Quote
Old 09-22-2014, 08:50 AM   #5
diz
Senior Member
 
diz's Avatar
 
Join Date: Nov 2010
Location: Laconia
Posts: 141
Thanks: 125
Thanked 35 Times in 20 Posts
Default Another WAG

This is also a WAG but I had an old Garmin handheld that did something like this. It had an internal battery that stored the GPS almanac when the 'main' batteries died.

After several years that internal battery died so every time I replaced the AAs in it I'd have to wait for it to rebuild the almanac. Garmin told me the almanac is basically a list of the GPS satellites the unit uses to figure out where it is.

I just Googled it and found this article that says it can take up to 12.5 minutes to get the unit working:

http://en.wikipedia.org/wiki/GPS_sig...gation_message
diz is offline   Reply With Quote
Sponsored Links
Old 09-22-2014, 09:20 AM   #6
AC2717
Senior Member
 
AC2717's Avatar
 
Join Date: Apr 2007
Location: Maynard, MA & Paugus Bay
Posts: 2,159
Thanks: 591
Thanked 258 Times in 189 Posts
Default

I Had this problem before with a Garmin. you need to hook it up to your computer and do a software update for is. A lot of times the Sats get repositioned or updated and the GPS needs to be as well. I did my update and everything worked better than before
__________________
Capt. of the "No Worries"
AC2717 is offline   Reply With Quote
Old 09-22-2014, 09:47 AM   #7
Woodsy
Senior Member
 
Join Date: May 2004
Location: Weirs Beach
Posts: 1,656
Thanks: 54
Thanked 739 Times in 308 Posts
Default

I had the same unit on my Donzi.... had the same symptoms you did. Talked to Garmin, & sent it to them.. they did the software update (free) and sent it back... same issue...

Come to find out it the GPS needed a new antenna (mushroom shaped)... Cheaper to replace the GPS....


Woodsy
__________________
The only way to eliminate ignorant behavior is through education. You can't fix stupid.
Woodsy is offline   Reply With Quote
Old 09-22-2014, 10:26 AM   #8
Steveo
Senior Member
 
Join Date: Apr 2004
Posts: 506
Thanks: 46
Thanked 118 Times in 60 Posts
Default Thanks

Quote:
Originally Posted by 8gv View Post
Total WAG's here...

Does it have a remote antenna?

If so, could the sun be heating it up a connection weakening it?

Do you deploy any shade from the sun or rain that has a metal frame effecting this?
It does have an external antenna, besides checking out the connections as you suggest maybe I will put a little umbrella over it.
Steveo is offline   Reply With Quote
Old 09-22-2014, 10:59 AM   #9
depasseg
Senior Member
 
Join Date: Jul 2011
Posts: 129
Thanks: 16
Thanked 33 Times in 28 Posts
Default

It might be a thermal issue as mentioned above.

But it could also be humidity. Cloudy/more humid days without bright/hot sun might enable a connection.
depasseg is offline   Reply With Quote
Old 09-22-2014, 11:11 AM   #10
Dave R
Senior Member
 
Dave R's Avatar
 
Join Date: Jul 2004
Posts: 2,785
Thanks: 226
Thanked 641 Times in 374 Posts
Default

Quote:
Originally Posted by Steveo View Post
Well I hope this very astute forum can help me with my weird GPS problem. I have a Standard Horizon Chart 155C GPS. It came with the boat I bought last year so I assume same age as boat at 8 years old. Last year the GPS worked fine. When turned on it would typically pick up satellites within a minute regardless of the weather. This year has been totally different. If it is totally sunny out it takes a very long time, usually never to pick up the satellites. If it is partly sunny I can usually pick them up after several minutes. If it is completely cloudy out I pick them up as soon as I turn it on.

Tell me that ain't weird. Can anyone help with an answer.
If you would like to test it, I have the same unit in my boat and we could swap and see if the problem follows the plotter or stays with the antenna. If you need a firmware update, Standard Horizon will lend you a flash memory module that you put in the plotter so you can update it yourself.
Dave R is offline   Reply With Quote
The Following User Says Thank You to Dave R For This Useful Post:
Steveo (09-22-2014)
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -5. The time now is 03:03 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.

This page was generated in 0.28278 seconds