Originally Posted by donradcliffe
AIS transponders are getting more popular by the week--I just passed English
Harbor in Antigua
, and picked up 36 transponders--all from yachts. If this trend continues, I can see where the commerical shipping
would use a filter near ports--I just hope they remember to turn it off in the open sea.
Let me point out that there is no "ignore Class-B" filter
Some hobbyist programs let you do this, but the AIS
systems in use on ships do not ignore Class-B. They may filter out stopped and otherwise non-threatening targets, but that's about it. Some older systems will not decode the Class-B "static" information (vessel name, callsign, dimensions), but they all properly decode position/course/speed for Class-B vessels. Newer systems decode it all.