Apparent jump across the North Sea - Explainer

Posted by Bruce Biddulph on 26-10-2025 12:39

The eagle-eyed might spot this is Live Reports (and see it in the logbook for the Forth)

VON FEEDER moved from The Forth to norwegian_coast.

Let me explain this quantum leap!

The last time the system saw this vessel, was in our port system 'forth'...our listener has now picked her up off Norway, so, in programming terms, the system behaved correctly, saw her last zone as a wider area zone 'The Forth' and added to her record she was in ANOTHER system zone...this happens quite a lot, especially when, as in this case, new zones are added and the system's listener given a wider remit...eventually this will die down as the system keeps track with its new zones in place and such 'jumps' will be rare.