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    Re: There are charts and there are CHARTS
    From: David Pike
    Date: 2015 Mar 7, 02:22 -0800


    To see the efforts that agencies in the UK go to keep their charts up to date you only have to go to the Associated British Ports – Humber (ABP Humber) site.  Their Hydrographic Office is responsible for Surveys from the Humber Approaches up into the R Ouse and down into the R Trent.  They print their own charts and also supply soundings to UKHO.  The general policy is here:  http://www.humber.com/Estuary_Information/Navigating_the_Estuary/Hydrography_and_Hydrographic_Services/
    The recency is here:
    http://www.humber.com/Estuary_Information/Navigating_the_Estuary/Chart_Viewer/  You’ll see it was last changed yesterday and last updated today.


    I’ve been out with them a couple of times.  It’s amazing.  You do the survey in the morning and by mid afternoon the survey’s available to all on the WWW.  This is the area I sail from at Brough Haven:  last surveyed 24th February 2015.
    Interestingly, their sounder is quite powerful and the trace distinguishes between soft mud at the top and hard mud below.  Below are a few happy snaps from my last two visits.





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