As previously notified by HYDROLANT 294/10, 322/10 and HYDROPAC 303/10, 337/10, mariners using ecdis are…

Original warning text

ECDIS SYSTEM.
1. AS PREVIOUSLY NOTIFIED BY
   HYDROLANT 294/10, 322/10 AND
   HYDROPAC 303/10, 337/10, MARINERS
   USING ECDIS ARE ADVISED NOT TO RELY
   SOLELY ON AUTOMATED VOYAGE PLANNING AND
   MONITORING CHECKS AND ALARMS. IT IS
   RECOMMENDED THAT MARINERS UNDERTAKE
   CAREFUL VISUAL INSPECTION OF THE ENTIRE
   PLANNED ROUTE TO CONFIRM THAT IT, AND
   ANY DEVIATIONS FROM IT, IS CLEAR OF
   DANGERS. THE ECDIS DISPLAY SHOULD BE
   CONFIGURED TO DISPLAY ALL SOUNDINGS
   DURING THIS INSPECTION.
2. PARTICULAR CARE SHOULD BE TAKEN WHEN
   PLANNED ROUTES CROSS AREAS WHERE ONLY
   SMALL SCALE ENCS (USAGE BANDS 1 AND 2)
   ARE AVAILABLE. IN SOME DISPLAY
   CONFIGURATIONS, SUCH AS WHEN NO NAMES
   ARE SHOWN, SMALL ISLANDS AND OTHER POINT
   FEATURES MAY BE DIFFICULT TO IDENTIFY OR
   COULD BE OBSCURED BY SURROUNDING DEPTH
   CONTOURS. SOME ECDIS SYSTEMS APPEAR ONLY
   TO UNDERTAKE ROUTE CHECK FUNCTIONS ON
   LARGER SCALE ENCS AND THEREFORE ALARMS
   MIGHT NOT ACTIVATE. THIS MAY NOT BE
   CLEARLY INDICATED ON THE ECDIS DISPLAY.
3. THE INTERNATIONAL HYDROGRAPHIC
   ORGANIZATION (IHO) IS LEADING TECHNICAL
   ACTION TO INVESTIGATE THESE MATTERS IN
   CONSULTATION WITH ECDIS EQUIPMENT
   MANUFACTURERS. FURTHER INFORMATION WILL
   BE MADE AVAILABLE THROUGH NOTICES TO
   MARINERS.
4. THIS ERROR DOES NOT EFFECT DNC.