AIS

solent clown said:
being mostly solent bound in our own boats till now, we have neber bothered with AIS, and our only real experience of seeing it in action was at Solent VTS on thier huge displays in the control room. Absolutely fascinating in itself, but the cleverest bit of all wss their ability to "switch off" the traces from non commercial craft. it went from a near indecipherable myriad of dots to a readable plot of the "big stuff"
Is that facility available to one and all?
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Some systems are more sophisticated than even that. They can exclude targets that are not moving much, not on a converging course, are not converging above a set rate, or will not converge within a set time. Very useful.
 
RichardS said:
"What nonsense" is aggressive.

"I'm not sure that is correct" is what I would have said. :encouragement:

Richard
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Sorry Richard, if i think something is nonsense, i'll call it nonsense. If we were standing at the bar having this conversation i'd probably say "you're talking bollox" (with a smile) and i doubt you'd be offended or accuse me of being aggressive.

Anyway, it's your round :very_drunk:
 
solent clown said:
being mostly solent bound in our own boats till now, we have neber bothered with AIS, and our only real experience of seeing it in action was at Solent VTS on thier huge displays in the control room. Absolutely fascinating in itself, but the cleverest bit of all wss their ability to "switch off" the traces from non commercial craft. it went from a near indecipherable myriad of dots to a readable plot of the "big stuff"
Is that facility available to one and all?
Click to expand...

I have seen Mr PVB state that Class B AIS can be turned off, he usually gets called a liar :)
 
FulmarJeddo said:
The Digital Yacht AIT 1500 that I have is very easy to configure. It came with a CD and drivers that you install on a PC. You simply run the proAIS2 software and plug the USB lead from the unit into the PC. I think you have to select the com port that it has installed to, but it was the only one that appeared in the drop down box. The MMSI can only be entered once but every thing else is easily changeable.
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Yes, I hope I've done that but not been able to fully test it yet.
Allan
 
poter said:
OK having read all the reply's I am now looking at getting a transmitter/receiver, however as I have to spend quite a bit of cash on up-grading Shady for the future, costs are paramount on new kit.
An AIS looks to be very expensive and I need it to work with my PC and Navionics charts. So what bit of kit is the best value for money & from whom?
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I too would like to know how to link ais to navionics
 
solent clown said:
being mostly solent bound in our own boats till now, we have neber bothered with AIS, and our only real experience of seeing it in action was at Solent VTS on thier huge displays in the control room. Absolutely fascinating in itself, but the cleverest bit of all wss their ability to "switch off" the traces from non commercial craft. it went from a near indecipherable myriad of dots to a readable plot of the "big stuff"
Is that facility available to one and all?
Click to expand...
No, only A class Transponders we leisure sailors only have B Class transponders.
 
stu9000 said:
I too would like to know how to link ais to navionics
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You can't display AIS target data on top of a Navionics chart unless and until Navionics upgrade their display software to allow this. You can display AIS data on some other charting programs like Open CPN.

However, there are many other PC/tablet programs which will display AIS data on a radar type display and I often find myself using such radar displays rather than the chart version as it's less cluttered and easy to see what's going on. Of course, once you are a few miles offshore, it doesn't make any difference as the chart is just blue anyway, like the radar display.

Richard
 
Sandy said:
No, only A class Transponders we leisure sailors only have B Class transponders.
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That is almost 100% true, but it still doesn't prevent manufacturers of receivers from installing the ability to select out class B targets, which is what solentclown was asking. I'm not aware that this facility is available on sets sold to yachtsmen.
 
"I'm not aware that this facility is available on sets sold to yachtsmen. "


I've not seen this either. Vesper allows you to virtually eradicate them by electing to ignore slow moving targets, you will still see fast class B power boats though and miss slow shipping. Perhaps a good thing.

The ability to exclude Class B, on a handy menu, would be useful.
 
doug748 said:
"I'm not aware that this facility is available on sets sold to yachtsmen. "


I've not seen this either. Vesper allows you to virtually eradicate them by electing to ignore slow moving targets, you will still see fast class B power boats though and miss slow shipping. Perhaps a good thing.

The ability to exclude Class B, on a handy menu, would be useful.
Click to expand...

who knows, maybe a manufacturer somewhere will see this and grant your wish ;-)
 
solent clown said:
who knows, maybe a manufacturer somewhere will see this and grant your wish ;-)
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OpenCPN discussed turning off class B and decided it was a bad idea. It can hide anchored targets and has an algorithm to make targets which you should keep an eye on more obvious.

Anyway, it's not a problem outside the solent and ships are generally professional run, hiding class B and hitting one would have the book thrown at you.
 
"turning off......................ships are generally professional run, hiding class B and hitting one would have the book thrown at you. "


Indeed.

The phrase "turning off class B" is probably misleading, as well. Bit of an emotive phrase, bit drama queenish. I guess officers would switch between the two views coming into somewhere like the Clyde, or ignore it all together as they will be leaning mainly on radar, and eyesight. In open water, which is where AIS is in it's pomp, generally there is no need or value in ignoring class B targets.
 
doug748 said:
"turning off......................ships are generally professional run, hiding class B and hitting one would have the book thrown at you. "


Indeed.

The phrase "turning off class B" is probably misleading, as well. Bit of an emotive phrase, bit drama queenish. I guess officers would switch between the two views coming into somewhere like the Clyde, or ignore it all together as they will be leaning mainly on radar, and eyesight. In open water, which is where AIS is in it's pomp, generally there is no need or value in ignoring class B targets.
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:encouragement:

The filtering is a bit more complicated than that anyway ISTR,
https://www.panbo.com/archives/2010/12/class_b_ais_filtering_the_word_from_dr_norris.html
 
pvb said:
But, and not wishing to resurrect the boring arguments on this, an AIS transceiver doesn't guarantee your boat's visibility to shipping. The best way of doing that is with an active radar reflector.
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Oh FFS - the marketing genius who invented those pointless things should be put in charge of selling BREXIT..
 
Ric said:
Oh FFS - the marketing genius who invented those pointless things should be put in charge of selling BREXIT..
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That's a bit unfair - the active radar reflectors work well enough - it's the passive ones that are worthless.
 
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