This does confirm that it is indeed much shallower AND narrower. 0.5m above Chart datum and only 50m wide is a bit tight. Best avoided anywhere near LW springs.
Think there is a bit of confusion here.
The 'pinch point' across the extending bar is far less than 50meters wide.
I think you will find that the 50meters quoted refers to the length of the track across the shallow bit, rather than the width.
Long Keeler, where did you read that? I had a look at the eMag but could not find anything about Osea. Did I miss it?