Definition
A wreck showing any part of its hull at chart datum is drawn in profile; a wreck with masts or superstructure showing has a different symbol again. A dangerous wreck at a depth of 28 m or less, or of unknown depth, is a hull outline with a dotted danger circle or is shown by the classic hull-and-cross symbol. Non-dangerous wrecks carry the abbreviation Wk with a sounding. Wrecks swept by wire drag show the swept depth with a line under the figure.
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