The fisherman, named only Martin, explained how he dragged the inflatable boat a few hundred yards offshore to go fishing in the Severn Estuary when the tide hit him and he got stuck in strong and rapid current. He decided to record the phenomenon as it was low tide with little wind, reports Wales Online.
In the video, Martin, of Black Rock Lave Net Heritage Fishery in Portskewett, Wales, said: “If I was on foot now I would panic. As it is, it’s a bit unnerving.
“Here is the rising tide. There is no turning back. Even though I am in my boat, my heart is beating a little.
“I wouldn’t do this if it hadn’t been for a dead calm, not a gust of wind – it’s annoying to say the least. But the fish will get here early.”
He continues: “I’ve done it a few times before and it’s always the same. Your instinct is to run…you can see how quickly it happens. You’d be in big trouble if you were on foot now – the sand will turn into quicksand.”
“Boats float, that’s what you have to think, boats float,” he adds at the end of the video.
The Severn Estuary is one of Britain’s largest estuaries and has the second highest tidal range in the world – up to 15m.
As the National Tidal and Sea Level Facility explains, in a few rivers, sometimes the beginning of the rising tide upstream is marked by a distinct, sometimes very vigorous wave – a tidal bore.
The Severn Bore is the most famous in the UK, reaching heights of up to 2m.
It causes a rapid rise in the water level, which continues for about an hour and a half after the borehole passes – the river instantly changing from a calm, slow current downstream to a strong, rapid current upstream.