Author Topic: New AIS Feeder With BIG Ears!!!  (Read 4466 times)

ve7prt

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New AIS Feeder With BIG Ears!!!
« on: 20 December, 2013, 10:49:11 pm »
So I'm watching my AIS display in Google Earth, and I notice the other day that I'm getting a whole bunch of ships around Cape Flattery where my own receiver can't quite reach. Even ships in Neah Bay, Washington are showing up. Not to mention fishboats and tugs/tows transiting up and down the Washington coast. This has me a bit baffled as my receiver can only hear about 40nm on a good day. And while Cape Flattery and Neah Bay are within that range, barely, only big deep-sea vessels are receivable at my location.

Now today, I'm sitting at work watching the same vessel traffic on the CCG's traffic monitoring systems (I'm a radio and VTS operator for the CCG). I have 4 ships in the traffic system off the northwest part of Vancouver Island. I happen to look on my own system and 2 of them show up (due to time query packets). I also notice via the AISHUB pages that a tug deep in Nootka Sound where my Estevan Point feeder can't hear is showing up.

Through all of this, I notice on the statistics pages that most of these vessels I've mentioned are being received by 2222-AISHub Test, and it looks like the data is from www.shipcruise.org, a site for cruise ship tracking and cruise vacation planning (I think?).

So my question is, what the heck is this shipcruise site using to hear some of these vessels? :o And will it continue into the foreseeable future? :) If it does, that would be awesome! 8)

This is definitely not a complaint, but rather a compliment to AISHUB for getting what looks like it could be a really good feed. For me, it's bolstering areas I am trying to receive already with limited success, and is adding in part of Vancouver Island I never thought I'd ever cover. ;D I shall be sending an email to the AISHUB team soon to get my geo-position filters expanded to include all of Vancouver Island (even though I already receive a fair bit of that data on the south eastern portion).

Cheers!
Mike

skery

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Re: New AIS Feeder With BIG Ears!!!
« Reply #1 on: 06 February, 2014, 08:37:06 pm »
Mike,  Someone got an AIS track for the Nordic Orion passing the Northwest Passage back in September.   I Know the Canadian Coast Guard and Ice center were involved at some level, becasue the St Laurent broke Ice for them
Do you know how or where to find or develop AIS based tracks for ships going back a few months to a few years?  I can't seem to find anything but the now cast stuff which is not useful to me.  thanks skery@csc.com

ve7prt

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Re: New AIS Feeder With BIG Ears!!!
« Reply #2 on: 14 February, 2014, 01:39:12 pm »
Mike,  Someone got an AIS track for the Nordic Orion passing the Northwest Passage back in September.   I Know the Canadian Coast Guard and Ice center were involved at some level, becasue the St Laurent broke Ice for them
Do you know how or where to find or develop AIS based tracks for ships going back a few months to a few years?  I can't seem to find anything but the now cast stuff which is not useful to me.  thanks skery@csc.com
I highly doubt that any terrestrial AIS systems exist through the NW Passage. Most of the CCG communications systems up there are MF/HF setups due to the extreme distances. There may be satellite AIS coverage up there, but that would be expensive, and I don't know if the operators would have any sort of logging set up. And looking at the articles regarding the vessel's voyage, I would say that the track was most likely generated by the ship's own data voyage logger, or navigational computers.

As for historical data, that would depend on the individual systems, and whether they are set up to log the data. My system currently saves all AIS position packets for each vessel, and archives that data on another computer nightly. But that also depends on any particular vessel being within range of my receivers, or any of my feeders.

Regards,
Mike