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Old 04-11-2014, 04:30 AM   #1
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Default AIS

I am looking seriously at AIS and have come across the following:
AIS Identifier
I don't think I am a particularly stupid person, but I am at somewhat of a loss to understand how this unit functions as regards read-out. Anyone have any ideas?
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Old 04-11-2014, 01:19 PM   #2
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As far as I can see it only has a receiver to comply with message passing aspects of the standards. There is no output to instruments at all. If it were really cheap and you were transiting an area where AIS was required, such as Singapore, it might be handy. But I suspect it will be mostly useless since it doesn't really comply even with Class B wrt power (1W vs 2W) or data output.

Something like this could be used to track bareboat rentals and so on, which seems to be their intended market.
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Old 04-13-2014, 02:26 AM   #3
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For what it's worth, we started off using an SR-161 (Smart Radio SR161 AIS Receiver) which is a compact little receiver, in conjunction with a PC running OpenCPN. Worked well. We have since moved on to a Camino 101 class B from the same retailer. Happy with that as well. I only wish they were compulsory for fishing boats.
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Old 04-14-2014, 05:25 AM   #4
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I bought two of them (SR161). Nice receiver all round, especially the price!
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Old 06-15-2014, 02:30 AM   #5
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To confirm what I was told by a "person of authority" (TK) at Singapore Ports:

"I don't care if you're rowing a canoe. If you enter Singapore waters you have your AIS transmitter switched on.".

So there it is, a receive-only device is not sufficient for Singapore waters regardless of the size of the boat. That includes passage through to Johor Bahru amongst other places.
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Old 06-15-2014, 02:57 AM   #6
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Spot on Del. All vessels which have a form of mechanical propulsion (including sailboats with an auxiliary engine) must be equipped with either an AIS transponder or a HARTS (Harbour Craft Transponder System) to sail in Singaporean waters. The following from their website:
"Any person who contravenes or fails to comply with any of the conditions and restrictions subject to or upon which any license is issued under the MPA (Harbour Craft) Regulations and MPA (Pleasure Craft) Regulations shall be guilty of an offence, and shall be liable on conviction to a fine not exceeding $5,000 and, in the case of a continuing offence, to a further fine not exceeding $1,000 for every day or part thereof during which the offence continues after conviction. The offence may be compounded up to a maximum fine of $50,000. In addition, the Port Master may cancel or suspend the license".

Internationally, the requirement is for all craft over 300 tons to be equipped with an AIS transponder, some ports in Europe have introduced rules requiring AIS for all vessels and Brussels is considering enacting laws which will make it mandatory for all vessels to be equipped with an AIS transponder.

Receive only will not satisfy regulations currently in force in Singapore and perhaps soon throughout the EU.
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Old 06-16-2014, 11:29 PM   #7
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Funny how it was that until a couple years ago it was illegal in the USA for recreational vessels to have AIS transponders--we could only have receivers here. Go figure. In 2009, we bought a radio with AIS receiver built in (Standard Horizon GX2100 as I recall) which works quite nicely but we will probably get a transponder within the year. It is nice to know that other ships can see us (beyond radar) as well.
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Old 10-10-2015, 06:32 AM   #8
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I know this thread is a year old. Anyway, I use that exact unit:
AIS Identifier

It is purely a "send only" identifier. We are required to use them here, even on little 10ft dinghies. Purely for security purposes by the government for tracking all traffic on the water. Would work fine for Singapore and Thailand requirements. Cost me $400, but you can buy actual transponders (send/receive) for as low as $650.

The good thing is that they do have an emergency mode, but then again, so does my VHF - DSC.
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Old 10-10-2015, 11:56 AM   #9
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A send-only unit is a novel idea. For complying with the regulations in certain places I suppose it could have a use, particularly as they say for deliveries and ad-hoc use. But for a permanent installation a Comar Class B at $650 is hard to beat.
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Old 10-10-2015, 01:01 PM   #10
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If you're prepared to trust in eBay retailers in China, a class B transponder can be had for as little as US$329 plus shipping and handling. I would prefer to buy from someone whose nuts I can tighten in the event of a malfunction.

I am amazed that the price for these things has not yet fallen. I bought my first GPS in the early 90s, as a boat show special for $4000. Now, I can get a better, more accurate GPS for free when it is linked to another piece of equipment, or for about $40 as a stand alone.

AIS is a wonderful thing. I hope, eventually, they come is as cheap as GPS.
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Old 10-10-2015, 05:51 PM   #11
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Cheapest I can find on AliExpress in US$379.00 inc. shipping and they seem to have nice features. Unfortunately they do suffer from feature overkill like so many products these days. They're also 2W which means that unlike the spec claims, they aren't actually Class B compliant.

Skipping all that silly crap with 4" screens you can't actually read, the best value seems to be the Matsutec HA102 at US$384 shipped. Simple, rugged and looks like it belongs on a yacht.

Also spotted the TX only unit as mentioned by makobuilders above, they call that a "fishing net beacon." Well, there's another use for it. Those sell for US120.00 plus shippping of US$32.00 which is a lot cheaper than the site he was obviously trying to promote.
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Old 10-11-2015, 02:04 PM   #12
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Quote:
Originally Posted by haiqu View Post
Cheapest I can find on AliExpress in US$379.00 inc. shipping and they seem to have nice features. Unfortunately they do suffer from feature overkill like so many products these days. They're also 2W which means that unlike the spec claims, they aren't actually Class B compliant.
. . . .
2W is the Class B max output, so it should be compliant - or have I missed something?
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Old 10-12-2015, 12:22 AM   #13
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IEC 62887-2 states 5W with 2W as a low power mode for Class B/SO.

IEC 62287-1 states 2W for Class B/CS which is the undesirable, unsafe, timeshared American standard.
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