AIS

[GHA]

"Barfleur" - the Poole to CIs ferry - while perfectly visible to the eye and radar was invisible are far as AIS was concerned near Anvil point yesterday morning....

This Barfleur?

Marinetraffic had it tracked every few minutes by the looks of things yesterday -

 

[Lucky Duck]

The very same, the 131 foot sunseeker immediately behind it was showing but not the ferry

 

[GHA]

The very same, the 131 foot sunseeker immediately behind it was showing but not the ferry

Odd, what time? marinetraffic had updates every 3 or 4 minutes. Looks like from a station on Portland.



https://www.marinetraffic.com/en/ais/home/shipid:176230/zoom:10

 

[Lucky Duck]

Around 09:15, we had departed Portsmouth harbour at 05:00, passed Sconce at 07:15 and Bridge around 8:00.

If it is showing a proper track from Old Harry to some way South of Anvil point then the problem would seem to be at my end, however plenty of other boats were showing.

The sunseeker was literally called Sunseeker131 so presumably was on sea trials or the owner lack imagination in naming his boat

 

[GHA]

Around 09:15, we had departed Portsmouth harbour at 05:00, passed Sconce at 07:15 and Bridge around 8:00.

If it is showing a proper track from Old Harry to some way South of Anvil point then the problem would seem to be at my end, however plenty of other boats were showing.

The sunseeker was literally called Sunseeker131 so presumably was on sea trials or the owner lack imagination in naming his boat

Fascinating! Looks like the marintraffic data is from vhf and not pretend internet so why didn't you pick it up yet see the sunseeker OK?

Tis a mystawee

 

[Lucky Duck]

Indeed, the turn to Starboard and then to Port near the beginning of the track was the ferry passing in front of us

 

[[70521]]

Fascinating! Looks like the marintraffic data is from vhf and not pretend internet so why didn't you pick it up yet see the sunseeker

Of course the Marine traffic data is from the VHF signal which is then piped down to the internet. Looks like the OP was in a blind spot, perhaps some part of the Superstruct, and could not pick up the signal.

VHF is notorious for being line of sight. The number of times we had to put a radio relay team on the hill opposite the one we were carrying out a rescue when I was in a MRT was legendary. So not really anything sinister.

 

[AntarcticPilot]

Of course the Marine traffic data is from the VHF signal which is then piped down to the internet. Looks like the OP was in a blind spot, perhaps some part of the Superstruct, and could not pick up the signal.

VHF is notorious for being line of sight. The number of times we had to put a radio relay team on the hill opposite the one we were carrying out a rescue when I was in a MRT was legendary. So not really anything sinister.

The Marinetraffic App can simulate a real AIS, via an internet connection, without there being a real AIS at all. I used it for bits of my passage from the Clyde. But the track only shows up in the App, not on a real AIS receiver, exactly as reported here. Seems odd that a commercial boat would do that, though.

 

[GHA]

Of course the Marine traffic data is from the VHF signal which is then piped down to the internet.

Marine traffic displays data from apps in addition to AIS data from live VHF.