Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 13-10-2015, 15:18   #1
Registered User

Join Date: Jun 2015
Posts: 23
VHF with built in GPS in the Cabin

I want to upgrade my VHF radio. I am thinking about a VHF with built in GPS.
This would give me a little redundancy but mainly I don't want to run a line from my GPS (at the helm) to my VHF (in the cabin) for DSC capability.
My concern is; will the GPS function ok without a direct view of the sky without an external antenna? A few years ago I'm sure the answer would have been "no", but with GPS improvements, I'm not sure (think your cell phone's GPS in a building). Your thoughts please.
__________________

__________________
cwoflyboy is offline   Reply With Quote
Old 13-10-2015, 15:34   #2
Registered User

Join Date: Jan 2009
Boat: Tartan 37 #6
Posts: 326
Re: VHF with built in GPS in the Cabin

I have a standard horizon gx1700 below, once in a while it 'complains' of no signal when turned on,but works fine after half a minute.
__________________

__________________
steamgoat is offline   Reply With Quote
Old 14-10-2015, 07:00   #3
Marine Service Provider

Join Date: Aug 2015
Posts: 9
Re: VHF with built in GPS in the Cabin

90 percent of the time it will work but without actually installing it first there is no way to know.
__________________
S0808 is offline   Reply With Quote
Old 14-10-2015, 07:13   #4
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,579
Images: 240
Re: VHF with built in GPS in the Cabin

Greetings and welcome aboard the CF, South Tackle.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 14-10-2015, 07:17   #5
Senior Cruiser
 
rebel heart's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Posts: 6,190
Images: 3
Re: VHF with built in GPS in the Cabin

Cell phones in buildings are different; they use assisted-GPS, first getting a rough location from cell towers, and possibly ending right there as that can be fairly accurate in urban areas, but if it needs to acquire GPS satellites it happens much faster because of the initial rough-fix. You can try it for yourself: even outdoors with a direct view of the sky, go into airplane mode (turn off your cellular access), and see how long the GPS takes to load. Even for modern phones it can be a minute or two, and if you close out of the app and come back a few seconds later, it's back to another full minute or two.

Regarding GPS receivers inside a cabin, it's always worked for me. Eventually I put an exterior GPS antenna in place for AIS transmission because I wanted to make sure I had as accurate a position (that I was relaying to other vessels) as possible. But the GPS receiver inside my cabin, located a few inches from the cabin top which then had a dodger above it, was fine.
__________________
rebel heart is offline   Reply With Quote
Old 14-10-2015, 07:41   #6
Registered User
 
travellerw's Avatar

Join Date: Jan 2014
Location: Martinique
Boat: Fortuna Island Spirit 40
Posts: 1,721
Re: VHF with built in GPS in the Cabin

I installed a GX1700 in July. So far it has worked through my cabin top %100.
__________________
travellerw is offline   Reply With Quote
Old 14-10-2015, 07:57   #7
Marine Service Provider

Join Date: Aug 2015
Posts: 9
Re: VHF with built in GPS in the Cabin

Quote:
Originally Posted by GordMay View Post
Greetings and welcome aboard the CF, South Tackle.
Thanks, glad to be here. Hopefully I can keep an eye on the electronics forum and help out where needed.
__________________
S0808 is offline   Reply With Quote
Old 14-10-2015, 08:17   #8
Registered User

Join Date: Nov 2013
Location: Southern Tier, NY
Boat: Newport 28
Posts: 253
Re: VHF with built in GPS in the Cabin

I have a GX2200 from Standard Horizon, mounted in the cabin and had no issues. I also, prior to installation, moved it EVERYWHERE in the cabin of a Hurley 22 I had in the yard, under a line of trees, to see if it would pick up. Even unhooking and re-hooking it back up at multiple points, from right under the hatch, to the center of the cabin, to back hidden under the quarter berth. The longest it took, was 45 seconds from hooking to power, to get a solid GPS lock. At that point, decided it wasn't going to be an issue on my other boat either.
__________________
-+-+-+-+-+-+-+-+-+
https://horizonsfound.blogspot.com/
CharlzO is offline   Reply With Quote
Old 14-10-2015, 08:17   #9
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Re: VHF with built in GPS in the Cabin

From an electrical standpoint, your GPS will most likely have a direct view of the sky when mounted inside your cabin. Fiberglass is essentially transparent to the radio frequency used (think about all those fiberglass antennas). If you have a metal boat, or lots of metal over the mounting spot, then this would be different, of course.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Old 14-10-2015, 08:25   #10
Registered User
 
ka4wja's Avatar

Join Date: May 2007
Location: Florida
Boat: Catalina 470
Posts: 2,033
Re: VHF with built in GPS in the Cabin

cwolfboy,
Assuming you have a fiberglass boat / deck???
You shouldn't have any (or few) issues....


My primary navigation GPS (Raymarine Raystar 125+) is mounted out in the clear, above the aft rail / above the bimini/solar panels....

But, since 2004, I've also been using a Garmin GPS 76 mounted inside at my Nav Station, as my GPS source for both of my DSC radios!!! Without any issue at all....never a dropped signal, and usually tracking 6 - 8 satellites+...even when in some serious Gales offshore, etc...
(and from 2006-2012, this was also my GPS source for my AIS receiver...)

And, since 2012, I have another GPS antenna connected to my AIS transponder, that is on a self immediately forward of my Nav Station....and it too has worked flawlessly!!

Have a look at these photos...

See the Garmin GPS 76...




See the white "Mushroom" antenna, near the upper left side of this photo, behind the fan and basket, to the left of the fan...





Now, I cannot speak for whatever radio you're considering....but if it has a modern GPS receiver (as it most probably does), it should work well for you...(again, assuming you have a fiberglass boat/deck)


I hope this helps...

Fair winds...

John
__________________
John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110
ka4wja is offline   Reply With Quote
Old 14-10-2015, 08:31   #11
Registered User
 
FamilyVan's Avatar

Join Date: Nov 2014
Posts: 1,779
Re: VHF with built in GPS in the Cabin

I have a GX2200 mounted in my cabin, i have never had a signal problem and I have a THICK deck. Glass-Balsa Core- Glass- about 1/2" of teak deck over that.

You should be good.

Sent from my XP7700 using Cruisers Sailing Forum mobile app
__________________
FamilyVan is offline   Reply With Quote
Old 14-10-2015, 08:58   #12
Registered User
 
goat's Avatar

Join Date: Apr 2013
Location: Everywhere (Sea of Cortez right now)
Boat: PSC Orion 27
Posts: 1,097
Re: VHF with built in GPS in the Cabin

You might as well get a receiver with AIS while you're at it.

Sent from my SGH-I257M using Cruisers Sailing Forum mobile app
__________________
goat is offline   Reply With Quote
Old 14-10-2015, 09:05   #13
Registered User
 
S/V Alchemy's Avatar

Join Date: May 2008
Location: Toronto
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,576
Re: VHF with built in GPS in the Cabin

Quote:
Originally Posted by steamgoat View Post
I have a standard horizon gx1700 below, once in a while it 'complains' of no signal when turned on,but works fine after half a minute.
I have an SH 2200 in a steel pilothouse with an aluminum roof. It acquires GPS and AIS within 15-20 seconds without an external GPS antenna. AIS, even in Lake Ontario, is a great thing to have, and, of course, it's like having an extra speedo to read your own SOG/COG off the VHF.
__________________
Can't sleep? Read www.alchemy2009.blogspot.com for fast relief. Can't read? Avoid www.volumesofsalt.blogspot.com, because it's just personal reviews of sea books.
S/V Alchemy is offline   Reply With Quote
Old 14-10-2015, 09:25   #14
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Re: VHF with built in GPS in the Cabin

You can run a very simple test by placing a cold handheld GPS where you envision the radio, then start it. See how long it takes to acquire then check how good the signal is.

Check what GPS the radio has, new units may have a 66 Sirf unit onboard or else something even newer = faster acquisition under the deck, better fix and all the newer handles.

We feed our VHF from a handheld Garmin 72 (old, not H model) and we never ever have any signal problems. Our deck is sandwich (foam) and then there is a dodger above it too - plenty of signal obstacles but apparently very little interference (other than slower start).

So, to sum up, it may work very well for you; still make the test to avoid getting unhappy with your new toy.

Cheers,
b.
__________________
barnakiel is offline   Reply With Quote
Old 14-10-2015, 09:37   #15
Registered User
 
FamilyVan's Avatar

Join Date: Nov 2014
Posts: 1,779
Re: VHF with built in GPS in the Cabin

Cwoflyboy, I just want to support a trend I'm seeing here. If you're getting a vhf with gps, its not a big jump to move up to the SH GX2200, which has an AIS receiver. Its a nice thing to have in busy shipping areas (I'm on the St Lawrence). I keep a CPA alarm on so ships don't sneak up behind me etc.

I think I payed less than $300 CDN for mine.

Which reminds me, Colemj, several months ago you gave me some advice on increasing the range setting, at the time I couldn't figure it out, but I since have.

Thanks

Sent from my XP7700 using Cruisers Sailing Forum mobile app
__________________

__________________
FamilyVan is offline   Reply With Quote
Reply

Tags
cabin, gps, vhf

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Windows 8 Tablet with built-in GPS billreilly OpenCPN 82 26-12-2015 14:51
toughbook in-built gps and opencpn ? LeFreak OpenCPN 0 14-04-2015 03:15
For Sale: Quality built 58 foot spruce wood mast built and located at Gil's Catamarans GdB Classifieds Archive 1 03-06-2013 22:40
Cabin Roof Beams - Built in Place bassman1956 Construction, Maintenance & Refit 12 03-06-2013 21:40
GPS with Built-in SMS Satellite Communications schoonerdog Navigation 14 24-09-2010 15:29



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:35.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.