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Old 11-06-2014, 09:35   #31
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Re: Why is an AIS transmitter so much more expensive than a receiver?

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Originally Posted by colemj View Post
Dave, I didn't make that quote you attributed to me - don't even know what it is referring to.

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Didn't someone from Standard Horizon come on here at one point and tell why that won't be happening? Maybe it was on Panbo? I hope you are correct, but I do remember somewhere a strong argument against it by someone in the industry…
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Old 11-06-2014, 09:41   #32
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Re: Why is an AIS transmitter so much more expensive than a receiver?

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Only allowing Class A devices that were for big ships only and massively expensive was pretty discouraging.

I suppose if you want to get pedantic about it, you could argue it was the market discouraging it not the govt but the point is when they first came out, no one was suggesting these for small pleasure craft and there was a lot of concern expressed about pleasure craft signals cluttering up the system (we still get that complaint now from folks who can't handle an occasional docked boat transmitting that it is sitting quietly in it's slip).

Class B was the eventual outcome but by then production of recievers was already happening creating the split between recievers and fully functional units. I'm guessing in the next 5 yrs the recievers will fade away as no new development goes into the recievers and the economy of scale catches up making the differential cost negligible.
It was always the intention to develop a solution for small( well smaller) craft, initially this was to be SOTDMA based, but a simpler version was then developed. planning for AIS stated in 1990, so its some time ago, the IMO mandate for class A was only issued in 2002 and class B followed in 2003.

The main issue was the slow update by the leisure industry of full class B, and this development was hindered by the red herring that is receive only AIS. The class B development was then furthered hindered by the ridiculous delay by NMEA in sorting the PGNs , especially the static data ones.

I don't think Ive seen any cohesive issue from the marine industry about leisure AIS.


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Old 25-06-2014, 03:41   #33
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Re: Why is an AIS transmitter so much more expensive than a receiver?

Thai authorities have now made it mandatory for all foreign yachts entering waters around Phuket to have AIS installed.
Details are sketchy at the moment but I believe those that don't already have a transmitter installed will have to buy or rent one.

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Old 26-06-2014, 05:19   #34
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Re: Why is an AIS transmitter so much more expensive than a receiver?

How difficult is it to get the AIS info out of a Standard Horizon and display it on a plotter with chart data?
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Old 26-06-2014, 07:13   #35
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Re: Why is an AIS transmitter so much more expensive than a receiver?

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How difficult is it to get the AIS info out of a Standard Horizon and display it on a plotter with chart data?
It is easy - just connect the two little wires from the SH to the nmea0183 input of the plotter.

Standard Horizon has exact wiring diagrams on their website for most of the common chartplotters.

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Old 26-06-2014, 10:11   #36
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Re: Why is an AIS transmitter so much more expensive than a receiver?

Just like televisions and other products, the more of something that is produced the lower the manufacturers cost per unit and therefore the lower the price per unit can be charged, provided there is enough price competition.

Right now there are nowhere near enough transceivers sold as there are something like VHF's sold. If this happens the prices will drop from where they are now.
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Old 26-06-2014, 10:14   #37
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Re: Why is an AIS transmitter so much more expensive than a receiver?

Or the us government makes them mandatory.

Then the Chinese will pump them out by the thousands.
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