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[Potential Bug] Ships less then 43 feet are not present in the feed for some areas #29

Open FredericDalibard opened 1 year ago

FredericDalibard commented 1 year ago

Hi, I am trying to build a sample web application that allows tracking specific ships including their historical trace. I have 2 ship examples I know the MMSIs of but i don’t receive any message from them while I know they are indeed transmitting their position. These are sailing vessels 37-feet and 43-feet long. Are these filtered out from the messages your stream is broadcasting? Thanks, Fred

aisstream commented 1 year ago

Could you provide the MMSIs for the vessels? If you are not comfortable providing them here I can provide an email you could send them too.

FredericDalibard commented 1 year ago

Yes, can you please provide an email address? Thanks.

aisstream commented 1 year ago

Send a email to contact (at) aisstream.io and we will look into it.

FredericDalibard commented 1 year ago

email sent with 3 MMSIs. They are all sailing vaissels 18-meter long or below. No sailing vessel under 23 meters is present in the feed. Not a single one.

aisstream commented 1 year ago

We have received your email.

FredericDalibard commented 1 year ago

Hi, any update on your end about the smaller boats not showing up in the stream?

Tarpanxt commented 1 year ago

Hi, same issue here. Any update on this?

PS. I tested with a few privately owned luxury yachts we service, got nothing.

aisstream commented 1 year ago

Apologies, we have dropped the ball on this issue. I cannot provide an ETA at this time for when this will get looked at.

Tarpanxt commented 1 year ago

Thank you for following up. Can you at least confirm now - do you filter out vessels by any criteria? Type, size, AIS class, etc. Or everything you got through your receivers being published to the web socket?

aisstream commented 1 year ago

Upstream of AIS receivers we do not do any filtering of vessels based on any property. Individual receivers themselves may however.

ALROCHARARI commented 1 year ago

Hope this will be adressed soon. My target was to develop an app to allow sailing clubs to easily follow their boats and a kiosk display solution on rapsberry pi to follow their traces on big screens in their club houses but unfortunately the big majority of them is under 45feets. No news?

aisstream commented 1 year ago

Hello, we currently do not filter boats at the service level, however individual AIS stations may preform downsampling and remove smaller vessels. Thus, vessels under a certain size may be missing from some locals. Unfortunately we do not have a comprehensive map of which stations remove which vessels at this time.

if you are looking to build an app, It is recommended to preform a test against the areas you will be needing data for as this the only method currently of definitively knowing of the data you need will be available.

housser commented 10 months ago

I'm wondering if I'm seeing similar symptoms. I am currently prototyping with a list of MMSI numbers to filter on, and can see a lot of data for some of the vessels in the area I'm interested in (so I'm confident in your data provider's general coverage of the area), but a handful of private sailboats never appear (even though I can see their data appearing in other platforms - e.g. 366848040, 503790100, 316048161).

Is there any way to query or visualize the underlying data, so that I could try to understand whether it's a problem with my code or one of my systems, or just that those boats are not being captured by the provider network?

dick10 commented 5 months ago

I was wondering if this issue is still open as all the ships I would like to track are sailing boats and I receive no data for those.