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Monthly Archives: March 2021

ECDIS – Compilation Scale and Scale Minimum

During passage planning the 2nd officer plans a passage apparently clear of visible dangers to navigation. ( IGNORE SHALLOW CONTOUR SETTINGS ) Consequence : The deep draft aframax tanker drawing aft draft of 15.0 m goes aground in safer waters well clear of the visible

ECDIS – Contour Settings

Traditional method of passage planning on paper chart: Using a draft of 14 mtr and applying a 2 mtr safety margin, the second mate would mark off areas with depth 16 mtrs and less, on the navigational chart. These areas would then be highlighted, using