T&T: Poor Man's AIS Receiver

[Peter Bennett]

I think most of these on-line AIS sites (I use
http://ais3.siitech.com/VTSLite/AView.aspx ) depend on hobbyists who
monitor AIS and share their data by various systems to get their data.
(see http://www.coaa.co.uk/shipplotter.htm for, example).

If there is no one monitoring in a particular area, there will be no
data available for that area.

Thursday, July 30, 2009, 5:35:18 PM, tands wrote:

t> On Mon, 27 Jul 2009 22:23:47 -0700, GARY RITZMAN wrote
>> If you go to marinetraffic.com you can see the AIS data on most 
>> large vessels. 

t> I've been looking at this sight lately. In my area, Buzzards Bay and the Cape
t> Cod canal are pretty busy commercial traffic areas. Yet today, having checked
t> several times, I saw essentially no AIS traffic on this site.

t> So, I called the Army Corps of Engineers at the canal. I asked him if he has
t> any traffic at the moment, as I was looking at marineraffic.com, and I saw none.

t> He said he was quite busy. He explained that the web site gets very incomplete
t> feeds. So, even though it refreshes often, in my part of the world it is not
t> representative of the traffic out there.

t> YMMV


-- 
Peter Bennett, VE7CEI    Vancouver, B.C., Canada
Ennos 31 "Honeycomb"
GPS and NMEA info: http://vancouver-webpages.com/peter 
Vancouver Power Squadron: http://vancouver.powersquadron.ca