Captain Beeky wrote:

> >I found it strange that one can see no part of any gate so I perused 
> >the TNC reports and all came clear when I found the following dated 
> >July 4th 2003
> >
> >"we went through the rotating sea lock (RH side, the other side is a 
> >fixed weir!)"
> >
> >There are some pictures of Neil's passage, so-to-speak,
> > but still no gate in sight.

Bjg added:
 
> The TNC is usually my first port of call, but it didn't 
> provide the solution this time. And I think Neil is probably 
> on the Shannon-Erne Waterway at this stage.
> 
> This was the photo that suggested the gate might rotate on a 
> horizontal axis.
> 
> http://www.friendsafloat.co.uk/forum/album_pic.php?pic_id=54&s
> id=01acf4153f2a4fb1cd87eaed26b410f1

See also http://en.wikipedia.org/wiki/File:Ribble_Link_04c216.jpg which
has another unhelpful photograph, but does explain how it works.

It's a rising sector gate. The gate drops to the bed to allow boats to
pass, which is why the TNC site and various boating blogs all show a
rather nondescript narrows with boats approaching / passing through /
departing, but no gate. For example see
http://nbfreespirit.blogspot.com/2008/07/going-through-sea-lock.html.

David Mack 

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