Joined the Under the bridge gang

[powerskipper]

its intresting

Why do you get enough tide up in Bursledon to make it this much of an issue? Is it the ebb + the river's current which makes it so?
What sort of speed does it run?

I ask as someone who's only been under the road and railway bridges a couple of times and never up to the motorway bridge.

The tide coming in say on a spring, comes in to start with nice and steady, then it seems to stall for an hour or so, it then comes in faster until high tide is reached, high tide hangs around for an hour or so with a little movement out then a little movement in then stalls again , it then exits very fast, to the extend that you can tidal waves between the pontoons on the incoming , but more on the out going tides.
As long as you are aware of what its doing, it can be a great help to berthing.

Have a look at a Southampton and Portsmouth tidal curve, you can predicate when it will be flowing fastest just by seeing how much water it is moving each hour.

 

[benjenbav]

Ah, thx pskip and davedpc. I didn't realise that the double tide had that much effect that far up the river.