M/V Brilliant, loving AIS

Ben Ellison

Ben Ellison

Panbo editor, publisher & chief bottlewasher from 4/2005 until 8/2018, and now pleased to have Ben Stein as a very able publisher, webmaster, and editing colleague. Please don't regard him as an "expert"; he's getting quite old and thinks that "fadiddling fumble-putz" is a more accurate description.

9 Responses

  1. Paul says:

    Ben, the MarineTraffic.com recieving station information is at least occasionally incomplete. For example, “Station 51”, shown in Oakland, California, is actually an aggregated feed from about four San Francisco-area stations all within perhaps a 100 mile radius (I’m one of them). We combine and share our data, and send the aggregated AIS data to MarineTraffic.com.
    So, there are more stations, and more widely distributed than indicated by MarineTraffic.com. However, the coverage is still very spotty.
    It is possible to embed the MarineTraffic.com chart in your own website. I’ve got one, primed to zoom in on VALIS when her transponder is turned on, on the VALIS website (http://www.sailvalis.com/AisTracking.htm)
    Another very interesting AIS sharing website is http://www.AisHub.net — but you need to send them data before you get to receive their worldwide data. One nice thing about AisHub is that they have lots of Class-B traffic (since Class-B has been in use much longer in Europe, where much of their AIS data is coming from), and they also have live AIS traffic from SAR and Aids to Navigation (AtoN). If you are testing AIS gear, having the data from a wide variety of station types is extremely handy.

  2. mitko says:

    That’s not only transmit power, antenna height is also very important. For merchant vessels its much higher than yachts, so radiohorizon is much far.

  3. JonM says:

    Brilliant probably passed within about 1000 yards of where I am sitting right now. Too bad I was not logging AIS data at the time. Very few Class B transmitters are seen in this area, based on several 24 hour weekend periods for which I collected data.
    Speaking of the Web and AIS, that stationary vessel near the boat ahead of Brilliant is “betterpets.com” with a Class A transmitter. It
    is a few miles North of me and I went to the betterpets.com Web site because I see it on my chartplotter all the time even though I have
    never seen the boat itself. I suppose that the extra range of Class A is well worth the cost for this guy!

  4. norse says:

    Internet AIS sites are common now, but can we say for sure that they are legal? What value does it add for the boat on the water? I can see that it would inhibit many from installing AIS in their boats, which defeats the purpose.

  5. Ben Ellison Ben Ellison says:

    Norse, amateur, commercial, and government AIS Web tracking is going on all over the world; it is obviously not illegal. And I suspect that there are many more boaters who like the idea of being tracked on the Web than there are those who don’t. If the fear is being targeted, that doesn’t make a lot of sense. A bad guy who can set up a good receiver for a few hundred dollars doesn’t need Web tracking.

  6. Ben Ellison Ben Ellison says:

    JonM, That other ‘yacht’ icon just off “betterpets.com” in the screen shot is also a Class B, a sailboat called “Daydreamer”. You can look up her yesterday’s track via Vessels/ Show All at the Marine Traffic site.

  7. Richard C says:

    I wonder if the next generation of AIS class “A” transponders will be priced low enough to attract recreational boaters. There’s a big difference between 2 watts and 12 watts. If one is serious about the value of this technology and also does some serious coastal sailing they may be willing to spend more for more coverage. Is a $1200 to $1500 class “A” in the future?

  8. Ben Ellison Ben Ellison says:

    SRT has suggested that there may be Class A transponders available at “well below $2,000” retail in the next year or so:

  9. How far off do you think you need to be seen? On the open sea large vessels see my class B at least 10 miles away, which is plenty to negotiate a meeting.

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