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Thread: External GPS Antennas, who's using them?

  1. #1

    Default External GPS Antennas, who's using them?

    My old Garmin has a little probably $30 external puck antenna mounted on the aluminum cabin roof.

    Looking at the new units, the external antennas for Lowrance and Garmin are $200+

    Anyone having luck with newer Gps's without an external in aluminum cabin boats? For what it's worth, my InReach seems to lock on fine inside the cabin.

    Thanks

  2. #2

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    I have a 545s and a 546s Garmin GPS in my Searunner without an external antenna and they work great. All over Homer, Seward, PWS and all the way up the Koyukuk. But I have a Garmin ext gps antenna in my garage if u need one :-)

  3. #3

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    No probs ever on mine; had an aluminum Koffler in pws, internal antenna on a 740 garmin, no problem. Run a 70dv on the Hewes here in Kbay, no problem, also internal antenna, no prob.
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  4. #4
    Member spoiled one's Avatar
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    I just installed a furuno TZTouch2 with the 12" screen with the integrated antenna. It is mounted in my helm which is aluminum. The unit was unable to find signal. I pulled it out and set it on dash and it worked fine. Works great now that I have the external antenna.
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  5. #5
    Member Jimw's Avatar
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    I dont roll with ocean boats guys but my garmin 76c mounted on the dash has no issues even on an ugly fogged in and raining Seward day.
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  6. #6
    Member Bullelkklr's Avatar
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    I have a 741xs with an internal antennae in a hewes hardtop that works fine. I have a buddy with a problem with his 5212 unit with remote gps antennae that he is trying to troubleshoot.

  7. #7
    Member DRIFTER_016's Avatar
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    FYI, the external antennas are usually better quality and their refresh rate is better.

    For instance the built in on Lowrance units refreshes @ 5hz while external refreshes twice as often @ 10hz.

  8. #8
    Member Bullelkklr's Avatar
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    Most of the newer garmins spec out at 10


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  9. #9

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    Thanks! Good to hear. Ended up going with a new Garmin echoMAP 44dv for $350. The screen is bigger and brighter than my old Garmin and it included the G2 charts, the nearest comparable unit was $250 more for a slightly larger screen, seemed like the best value out there if you don't need a lot of connectivity and have good eyes for the smaller screen. I have a separate Furuno sounder and separate radar so didn't need a large screen to display multiple functions. In reality, updating 5 times a sec vs 10 times a sec seems like it would make little difference for how I use my GPS. The new antenna's I found are actually completely separate GPS receivers and not actual antennas, so that's why they cost so much.

    Next question, who's using the G2 Vision HD charts? There is a mail in rebate for $200 if I buy the South Alaska chip before July 10th, not sure if it's worth it, the regular G2 charts looked pretty good.

  10. #10
    Member Bullelkklr's Avatar
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    Shows what I know, didn't even know there were new HD chips. I use the bluechart g2 and am pretty happy with it. It came with my 741xs but I bought the chip for a 100$ when I had my old 546S. Got some studying to do on it


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  11. #11

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    I think the new chips (if not bundled with a new gps) for G2 run $160, Navionics+ $200. Then the Premium chips like Navionics Platinum and G2 Vision HD are $300. They are expensive so finding a bundled GPS with the regular G2 charts for $350 seemed like a deal.

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