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Author Topic:   AIS: On-line displays

jimh posted 02-24-2007 12:10 PM ET (US)
Here is a nicely done website which shows vessel position and track data from AIS reception:
http://www.boatingsf.com/ais_map.php
Chuck Tribolet posted 02-24-2007 07:43 PM ET (US)
Very cool.
But I wonder about the 600' vessel "under sail" at 0.1 knots.
Based on where it is, I suspect it's at one of the standard
SF anchorages and the bridge monkey didn't know how to setup
the AIS.
I'd really like to see similar info for Monterey on a weekend.
I suspect it would be pretty thin.
What vessels are required to have AIS transmitters? I know
the big boys are, but what about, say, 50' commercial
fishing vessels?

Chuck
Yiddil posted 02-25-2007 09:43 PM ET (US)
That is so cool...wish they did that for other ports Like Baltimore etc...
where2 posted 02-25-2007 09:57 PM ET (US)
My favorite was the passenger ship with a status of "Moored" and a vessel speed of 34.8kts. Think how fast that would go if they hoisted the anchor!!
It seems this needs a little fine tuning if this AIS is going to work. I like the looks of it, but the display of "Under Power" and "Moored" needs some help.
doobee posted 02-27-2007 06:24 PM ET (US)
I used an AIS receiver on a boat delivery from Cape Cod to NJ. I found that the data input by the user was frequently wrong, however the critical data for collision avoidance, which comes from the transmitting vessel's GPS, was very useful.
Coming through NYC, targets were everywhere. For some reason, the high speed commuter ferries are not required to transmit data. While size does matter, you'd think that speed would be a consideration as well. I don't know how many boats they have in their fleet, but I bet if they outfitted evry one with a transmitter, it would still be cheaper than the inevitable lawsuit resulting from a collision.
The AIS receiver is pretty reasonable when you consider the info it gives you. On the boat I delivered, the whole setup only cost @$300 for the receiver and splitter to attach to his VHF antenna. His was running on Nobeltec but a lot of the GPS plotters offered today are AIS capable.

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Author	Topic: AIS: On-line displays
jimh	posted 02-24-2007 12:10 PM ET (US) Here is a nicely done website which shows vessel position and track data from AIS reception: http://www.boatingsf.com/ais_map.php
Chuck Tribolet	posted 02-24-2007 07:43 PM ET (US) Very cool. But I wonder about the 600' vessel "under sail" at 0.1 knots. Based on where it is, I suspect it's at one of the standard SF anchorages and the bridge monkey didn't know how to setup the AIS. I'd really like to see similar info for Monterey on a weekend. I suspect it would be pretty thin. What vessels are required to have AIS transmitters? I know the big boys are, but what about, say, 50' commercial fishing vessels? Chuck
Yiddil	posted 02-25-2007 09:43 PM ET (US) That is so cool...wish they did that for other ports Like Baltimore etc...
where2	posted 02-25-2007 09:57 PM ET (US) My favorite was the passenger ship with a status of "Moored" and a vessel speed of 34.8kts. Think how fast that would go if they hoisted the anchor!! It seems this needs a little fine tuning if this AIS is going to work. I like the looks of it, but the display of "Under Power" and "Moored" needs some help.
doobee	posted 02-27-2007 06:24 PM ET (US) I used an AIS receiver on a boat delivery from Cape Cod to NJ. I found that the data input by the user was frequently wrong, however the critical data for collision avoidance, which comes from the transmitting vessel's GPS, was very useful. Coming through NYC, targets were everywhere. For some reason, the high speed commuter ferries are not required to transmit data. While size does matter, you'd think that speed would be a consideration as well. I don't know how many boats they have in their fleet, but I bet if they outfitted evry one with a transmitter, it would still be cheaper than the inevitable lawsuit resulting from a collision. The AIS receiver is pretty reasonable when you consider the info it gives you. On the boat I delivered, the whole setup only cost @$300 for the receiver and splitter to attach to his VHF antenna. His was running on Nobeltec but a lot of the GPS plotters offered today are AIS capable.