Khawr abd allah was recently surveyed following mine clearance activities, in order to assess the channel's…

Original warning text

1. KHAWR ABD ALLAH WAS RECENTLY SURVEYED FOLLOWING
   MINE CLEARANCE ACTIVITIES, IN ORDER TO ASSESS
   THE CHANNEL'S NAVIGABILITY. THIS SURVEY WAS
   REQUIRED IN A SHORT TIMELINE AND SO IS
   SUBJECT TO LIMITATIONS:
   A. ONLY AREAS WITHIN THE SWEPT CHANNEL WERE
      SURVEYED, AS WELL AS BERTH AREAS WITHIN
      THE PORT OF UMM QASR. NO UPDATED SURVEY
      DATA IS AVAILABLE OUTSIDE OF THE CHANNEL.
   B. TIDES FOR THIS REGION ARE LARGE AND MEASURED
      DATA IS UNAVAILABLE. TIDAL CORRECTIONS TO
      THE SURVEY HAVE BEEN CALCULATED USING THE
      BEST TECHNIQUES AVAILABLE FROM TIDE MODELS,
      BUT VERTICAL ERRORS IN SOUNDINGS ARE
      ASSESSED AS APPROXIMATELY ONE METER AND
      COULD BE GREATER IN CERTAIN METEOROLOGICAL
      CONDITIONS. ADDITIONALLY, THE OBSERVED
      LOW TIDES HAVE BEEN NOTED TO BE ONE METER
      LOWER THAN EXPECTED.
2. ACCORDING TO BRITISH ADMIRALTY CHART 1235 (7TH ED)
   DATED 17 APR 03, THE INTENTION OF THE RAPID
   SURVEY WAS TO LOCATE UNKNOWN DANGERS QUICKLY.
   THE LINE SPACING USED WAS WIDER THAN NECESSARY
   TO FULLY PROVE THAT QUESTIONABLE SHOALS DO NOT
   EXIST, THEREFORE PREVIOUSLY CHARTED SHOALS
   HAVE TO BE RETAINED.
3. DUE TO THE NARROW CHANNEL, SURVEY LINE SPACING
   AND PROBABLE SOUNDING ERROR, MARINERS SHOULD
   USE EXTREME CAUTION WHEN NAVIGATING THE
   KHAWR ABD ALLAH TO UMM QASR.