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Rocks, Wrecks, Obstructions
|Ref.||IHO Symbology||Description||CHS Symbology|
Danger line: A danger line draws attention to a danger which would not stand out clearly enough if represented solely by its symbol (e.g. isolated rock) or delimits an area containing numerous dangers, through which it is unsafe to navigate.
Swept by wire drag or diver
Depth unknown, but considered to have a safe clearance to the depth shown
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