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Old 01-01-2017, 16:44   #1
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Class B AIS waste of money

I'm hoping to prompt some discussion on what a total waste of money purchasing and installing a class B transponder on your please craft is.

If your objective is is "be seen by commercial traffic", forget it! I personally have been summoned to the bridge to SPECIFICALLY check Furuno/ECDIS radar settings and ensure that "except class B" is ON, meaning exclude them. For proof see

http://gcaptain.com/class-filtering-targets-ships/

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Old 01-01-2017, 16:48   #2
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Re: Class B AIS waste of money

Yes you are right.

Total waste of money.

Especially when ignorant illegal ships officers turn the damn thing off.
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Old 01-01-2017, 16:54   #3
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Re: Class B AIS waste of money

What nonsense. AIS is very high on the bang for the buck electronics on a cruising boat. If a commercial ship needs to or decides to declutter a screen to make their display more readable, that's their choice. It doesn't negate all the other times that an AIS signal is a good value.
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Old 01-01-2017, 17:12   #4
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Re: Class B AIS waste of money

Quote:
Originally Posted by SV Enough View Post
I'm hoping to prompt some discussion on what a total waste of money purchasing and installing a class B transponder on your please craft is.

If your objective is is "be seen by commercial traffic", forget it! I personally have been summoned to the bridge to SPECIFICALLY check Furuno/ECDIS radar settings and ensure that "except class B" is ON, meaning exclude them. For proof see

Class B AIS - Filtering Of Targets By Ships – gCaptain

Mark Fay,
Merchant Marine Credential Jr. Engineer, QMED, AS-E / MSC ET
Absolute FUD!.

From your link, this:

"While Class B data can, and sometimes should, be suppressed in port it is important technology that will help us avoid boats which venture offshore. Therefore deactivating the display of Class-B targets on your ECDIS and RADAR is an action that should be logged and a note should be placed in your passage plan (or penciled next to the sea buoy on the chart) to remind all watchstanders to reactivate the setting once you have set out for sea."

I don't rely on a ship using AIS in a harbour/port area to see me. I make damned sure that I don't cause any trouble for the ships regardless of whether they see me or not. And even receive only AIS is fine for that in a harbour.
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Old 01-01-2017, 17:21   #5
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Re: Class B AIS waste of money

I've had numerous ships on the high seas confirm that they are seeing my Class-B transponder. Some of these have initiated the VHF conversation, just because they were interested in what a sailboat was doing 1000 miles from land.

So, perhaps some ships disable their AIS Class-B reception, but in my unscientific survey most don't.
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Old 01-01-2017, 17:31   #6
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Class B AIS waste of money

Class B AIS is as good as you make it.

If ships do not want to see you in a harbor, so be it.

It's the LAW OF TONNAGE. Stay out of their way or pay the price.
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Old 01-01-2017, 17:40   #7
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Re: Class B AIS waste of money

Quote:
Originally Posted by SV Enough View Post
I'm hoping to prompt some discussion on what a total waste of money purchasing and installing a class B transponder on your please craft is.

If your objective is is "be seen by commercial traffic", forget it! I personally have been summoned to the bridge to SPECIFICALLY check Furuno/ECDIS radar settings and ensure that "except class B" is ON, meaning exclude them. For proof see

Class B AIS - Filtering Of Targets By Ships – gCaptain

Mark Fay,
Merchant Marine Credential Jr. Engineer, QMED, AS-E / MSC ET
What I have heard is that ships only turn AIS B of in some zones with high intensity traffic where the many AIS B targets can be very confusing.

It was on one of those zones that the Captain disconnected the AIS B targets?
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Old 01-01-2017, 18:05   #8
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Re: Class B AIS waste of money

My experience is that many ships haven't seen me until I radio them. But, I definitely don't think they are a waste of money, they are right up there on my must have list.

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Old 01-01-2017, 18:08   #9
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pirate Re: Class B AIS waste of money

Definitely NOT a waste of money if you feel you need one..
Otherwise.. Yes..
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Old 01-01-2017, 18:11   #10
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Re: Class B AIS waste of money

The thing with a ais is there's no downside that I can see, how can knowing exactly where ships are in relation to your own vessel or they ( once notified) knowing exactly where you are be a bad thing?

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Old 01-01-2017, 18:14   #11
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Re: Class B AIS waste of money

In waters crowded with pleasure boats using class B AIS, one can hardly blame the ship for turning off the B alarms. I usually do that myself when in such places!

But so far I've not seen that ships have filtered me out at sea. I've spoken to a couple who were not altering course at great distance, just to be sure. They have all said that they were tracking us and would alter course as required. There may not be 100% compliance with allowing class B alarms at sea, but then there isn't 100% compliance with the requirement for competent watchkeepers on the bridge (as Jessica Watson found out).

Waste of money? Ridiculous, IMO.

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Old 01-01-2017, 19:31   #12
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Re: Class B AIS waste of money

OK, hands up everybody who has followed the trail that led from Gcaptain to Panbo and then all the way down to Dr Norris... Panbo: The Marine Electronics Hub: Class B AIS filtering, the word from Dr. Norris

The desire of 'big ship' bridge teams to disable Class B AIS would possibly not be so great if WAFIs turned off their AIS when it was not needed... eg.. when alongside ( see pic ) and when just out for a Sunday sail around the harbour.

As the good Doctor says .. ' It should not be forgotten that the bridge windows form the most widely used navigational aid. '

Another small note... I have spent some time in the not too distant past in the Auckland area where all the fast ferries run Class B as do quite large ships of the Royal New Zealand Navy.
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Old 01-01-2017, 19:42   #13
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Re: Class B AIS waste of money

Speaking of which...

Hello peoples....... you really do not need to be running AIS in Sydney Harbour on a sunny afternoon.....!!
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Old 01-01-2017, 19:47   #14
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Re: Class B AIS waste of money

...And, even if they MIGHT filter my signal out, I still see them - If you don't expect them to be looking out for you, you wont get surprised...
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Old 01-01-2017, 21:40   #15
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Re: Class B AIS waste of money

In some parts of the world they are actually required on foreign pleasure craft.
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