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isolated danger mark

sea mark indicating a danger spot

en-GB/ˈaɪsəleɪtɪd ˈdeɪnd͡ʒə ˈmɑːk/
en-US/ˈaɪsəˌleɪtɪd ˈdeɪnd͡ʒɚ ˈmɑɹk/

Categories:

navigational aid