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Old 16-01-2017, 12:58   #1
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Marine radio w/ AIS transceiver

Has anyone heard of a VHF with AIS class B transmit capabilities? Sure would be a selling point. No splitter, AIS dedicated antenna or unit.
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Old 16-01-2017, 13:27   #2
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Re: Marine radio w/ AIS transceiver

Standard Horizion is now advertising their GX6500 Quantum radio with GPS and an integrated class B AIS transponder......

DougR
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Old 16-01-2017, 14:10   #3
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Re: Marine radio w/ AIS transceiver

Thanks. It seems it still requires the second antenna therefore lacking the biggest selling point for me. It looks like a hell of a unit though.
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Old 16-01-2017, 14:24   #4
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Re: Marine radio w/ AIS transceiver

I think the AIS B standard actually requires a dedicated antenna/splitter
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Old 17-01-2017, 09:05   #5
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Re: Marine radio w/ AIS transceiver

I'm certainly no expert here, as evidenced by some successes and some fails over the years. I have found some things simply don't lend themselves to a shared antenna, the two units don't play well with each other when fighting over the antenna.

Whereas one antenna might be nice it seems two may be required to optimize, or even work at all.
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Old 17-01-2017, 09:53   #6
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Re: Marine radio w/ AIS transceiver

Class B AIS transponder requires a different separate antenna. Instead of putting in a splitter, I mounted my AIS antenna above my radar which is gimballed on the backstay. Ocean passages have offered the oppotunity to know that my AIS antenna is mounted high enough to "be seen" when transmitting for plenty of distance "out there". The antenna is approximately 24 feet above the water.
Be prepared for the bridge (persons on watch) of the big ships to not respond to you when you hail them on VHF to confirm that they "see" you and to confirm that they are on a course that will not collide (this is when you are outside of the shipping lanes and you are under sail in open water). Usually I have to state their exact position (from radar), or state their MMSI number that shows on my AIS transceiver to get them to answer VHF Channels 16, 12, 13 or 9. Each time they have confirmed that they "see me" on AIS and confirm my MMSI number.
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Old 17-01-2017, 10:28   #7
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Re: Marine radio w/ AIS transceiver

Vesper 850 I have works great with Vesper splitter sharing with VHF. I haven't ever heard of a requirement of stand alone antenna although that has some benefits. I believe the requirement is it must have its own GPS receiver/ antenna.
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Old 17-01-2017, 12:22   #8
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Re: Marine radio w/ AIS transceiver

A Class B AIS transponder does not require a separate VHF antenna, a splitter works just fine. Legally it does have to have its own GPS, this may or may not require an external GPS antenna.
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Old 17-01-2017, 13:18   #9
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Re: Marine radio w/ AIS transceiver

Quote:
Originally Posted by SV Bacchus View Post
I'm certainly no expert here, as evidenced by some successes and some fails over the years. I have found some things simply don't lend themselves to a shared antenna, the two units don't play well with each other when fighting over the antenna.

Whereas one antenna might be nice it seems two may be required to optimize, or even work at all.
I have had the Standard Horizon GX2100 tranceiver with AIS on my yacht for two years using shared antenna and it works great!
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Old 17-01-2017, 20:05   #10
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Marine radio w/ AIS transceiver

Quote:
Originally Posted by Martkimwat View Post
I have had the Standard Horizon GX2100 tranceiver with AIS on my yacht for two years using shared antenna and it works great!


Your AIS is receive only though.
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Old 17-01-2017, 21:27   #11
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Re: Marine radio w/ AIS transceiver

Quote:
Originally Posted by DougR View Post
Standard Horizion is now advertising their GX6500 Quantum radio with GPS and an integrated class B AIS transponder......

DougR
Is it out already? I thought it was scheduled for this spring.
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Old 18-01-2017, 13:10   #12
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Re: Marine radio w/ AIS transceiver

Not till next month at least from what read.
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Old 18-01-2017, 14:26   #13
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Re: Marine radio w/ AIS transceiver

I don't think the S.H. GX6500 AIS class B transceiver is FCC approved yet...
It doesn't come up searching on the SH website but, is listed in the 2017 brochure.

I will keep an eye on Icom for a new VHF integrated class B transponder as well.

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Old 18-01-2017, 15:56   #14
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Re: Marine radio w/ AIS transceiver

I agree with S V...

Ideally, there's a separate GPS (receiving) antenna for reliable identification of ships. AIS transmission occurs on VHF, not at microwave frequencies such as GPS. Hence,
to reduce signal distortion, use separate VHF, GPS antennas.

S.H. brochure states the new GX6500 Quantum Class B pkg includes a GPS antenna.

Jim, AB1BR
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Old 18-01-2017, 18:25   #15
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Re: Marine radio w/ AIS transceiver

Priority given to VHF, its antenna resides on the masthead on my boat. 53' off the water. The AIS antenna is on my "H" beam. 11' off the water. Getting ready to rewire my mast and was curious about new gear available. I am happy with my Vesper but the extra range would be a plus. Am considering the spreaders. Am not wanting an external splitter.
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