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Gps with built in antenna

 
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bladesmith



Joined: 08 Nov 2017
Posts: 5
City/Region: Galisteo
State or Province: NM
C-Dory Year: 2007
C-Dory Model: 16 Cruiser
PostPosted: Mon Jan 14, 2019 10:35 pm    Post subject: Gps with built in antenna Reply with quote

Hi Folks..I recently bought my first CD, a 2007 16' cruiser. My first boat with a pilot house...Can I mount a GPS with a builtin antenna inside my cabin or do I need a separate antenna mounted out side?... Thanks
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rogerbum



Joined: 21 Nov 2004
Posts: 5922
City/Region: Kenmore
State or Province: WA
C-Dory Year: 2008
C-Dory Model: 255 Tomcat
Vessel Name: Meant to be
Photos: SeaDNA
PostPosted: Mon Jan 14, 2019 10:49 pm    Post subject: Reply with quote

I've had mine mounted inside the cabin with no external antenna for years. No problems. Signal passes through fiberglass quite well.
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Saxe Point



Joined: 24 Jan 2012
Posts: 77
City/Region: Sooke
State or Province: BC
PostPosted: Mon Jan 14, 2019 10:53 pm    Post subject: Reply with quote

I’ve got a Garmin Echomap 50DV chart plotter on my dash inside my fibreglass pilot house. My boat is not a C Dory, but the pilot house is fibreglass and very similar to many, including the C Dory. Works perfectly and picks up satellites very quickly. I can’t imagine an external antenna would make any difference to the GPS performance. I’ve read that my experience is common.
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colbysmith



Joined: 02 Oct 2011
Posts: 4523
City/Region: Madison
State or Province: WI
C-Dory Year: 2009
C-Dory Model: 25 Cruiser
Vessel Name: C-Traveler
Photos: C-Traveler and Midnight-Flyer
PostPosted: Tue Jan 15, 2019 12:06 am    Post subject: Reply with quote

I've got two Garmin Chartplotters, an AIS transceiver, and now a VHF radio with GPS. I haven't hooked the new radio up yet, however I've had no problems with the chartplotters and AIS transceiver receiving GPS signals without an external antenna, and I don't expect to have a problem with the VHF radio. Colby
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PaulNBriannaLynn



Joined: 26 Oct 2012
Posts: 757
City/Region: Fort White
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 22 Cruiser
Vessel Name: TBD
Photos: Lorelei
PostPosted: Tue Jan 15, 2019 7:57 am    Post subject: Reply with quote

I removed the GPS antenna on the roof of our boat when I realized it wasn't hooked up to anything. The Garmin picks up satellites right away with no issues.
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2007 22 cruiser sold 10/2021
2009 Parker 23 sold 10/2017
2003 22 cruiser sold 3/2016
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thataway



Joined: 02 Nov 2003
Posts: 20779
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Tue Jan 15, 2019 1:16 pm    Post subject: Reply with quote

Modern GPS receivers will pick up the GPS signals in cars, boats, planes, etc, unless there is extensive shielding--for example if you had a steel boat, and GPS on lower deck. Even with trawlers with hard tops flying bridge (including aluminum in the hard top), I have had the GPS work in the cabin below.
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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL
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bladesmith



Joined: 08 Nov 2017
Posts: 5
City/Region: Galisteo
State or Province: NM
C-Dory Year: 2007
C-Dory Model: 16 Cruiser
PostPosted: Tue Jan 15, 2019 1:49 pm    Post subject: Reply with quote

Thank you all for the quick response
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janjackparadise



Joined: 06 Feb 2020
Posts: 2
City/Region: Port Charlotte
State or Province: FL
PostPosted: Thu Feb 06, 2020 10:16 am    Post subject: Reply with quote

I would like to see the C-Dory you have for sale in Florida.
What marina is the boat located at ?
Thank you

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Marco Flamingo



Joined: 09 Jul 2015
Posts: 1154
City/Region: Seattle
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 16 Cruiser
Vessel Name: Limpet
Photos: Limpet
PostPosted: Thu Feb 06, 2020 12:09 pm    Post subject: Reply with quote

Bladesmith,

I still find electronics to be one of the most confusing boat purchases. Internet research to find out if there is an all-in-one product that can answer your issues, or whether a new unit will interface with existing electronics takes some research. To further complicate things, asking what electronics will work for you is a bit like asking others what size shoe you should buy. Ultimately, individual needs should override internet market preferences. So I don't have much to offer in the way of product choices, other than to say good luck.

Mark
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hardee



Joined: 30 Oct 2006
Posts: 12632
City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
PostPosted: Thu Feb 06, 2020 8:27 pm    Post subject: Reply with quote

I have one GPS antenna on the outside cabin top, and 2 inside on the shelf. I cannot tell any functional difference between them.

Harvey
SleepyCMoon

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ssobol



Joined: 27 Oct 2012
Posts: 3362
City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
PostPosted: Fri Feb 07, 2020 1:06 am    Post subject: Reply with quote

I have two GPS antennas on the roof. One for the chartplotter (NMEA 0183). The boat came with that one. I added a NMEA 2000 GPS receiver antenna (all in one) for my NMEA 2000 network. Never thought of putting the one I added anywhere else.
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